Fortinet FortiGate FortiGate-3600 Instruction Manual

FortiGate 3600 Administration Guide
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FortiGate-3600 Administration Guide
Version 2.80 MR6
5 November 2004
01-28006-0011-20041105

© Copyright 2004 Fortinet Inc. All rights reserved.
No part of this publication including text, examples, diagrams or illustrations may be reproduced,
transmitted, or translated in any form or by any means, electronic, mechanical, manual, optical or
otherwise, for any purpose, without prior written permission of Fortinet Inc.
FortiGate-3600 Administration Guide
Version 2.80 MR6
5 November 2004
01-28006-0011-20041105
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Contents
FortiGate-3600 Administration Guide 01-28006-0011-20041105 3
Table of Contents
Introduction .......................................................................................................... 13
About FortiGate Antivirus Firewalls................................................................................... 13
Antivirus protection ....................................................................................................... 14
Web content filtering ..................................................................................................... 15
Spam filtering ................................................................................................................ 15
Firewall.......................................................................................................................... 15
VLANs and virtual domains........................................................................................... 17
Intrusion Prevention System (IPS)................................................................................ 17
VPN............................................................................................................................... 18
High availability ............................................................................................................. 18
Secure installation, configuration, and management .................................................... 19
Document conventions ..................................................................................................... 21
FortiGate documentation .................................................................................................. 22
Comments on Fortinet technical documentation........................................................... 22
Related documentation ..................................................................................................... 23
FortiManager documentation ........................................................................................ 23
FortiClient documentation ............................................................................................. 23
FortiMail documentation................................................................................................ 23
FortiLog documentation ................................................................................................ 24
Customer service and technical support........................................................................... 25
System status....................................................................................................... 27
Console access................................................................................................................. 27
Status................................................................................................................................ 28
Viewing system status .................................................................................................. 28
Changing unit information ............................................................................................. 31
Session list........................................................................................................................ 33
Changing the FortiGate firmware...................................................................................... 34
Upgrading to a new firmware version ........................................................................... 35
Reverting to a previous firmware version...................................................................... 37
Installing firmware images from a system reboot using the CLI ................................... 39
Testing a new firmware image before installing it ......................................................... 42
Installing and using a backup firmware image .............................................................. 44
System network ................................................................................................... 49
Interface............................................................................................................................ 49
Interface settings........................................................................................................... 50
Configuring interfaces ................................................................................................... 55
Zone.................................................................................................................................. 59
Zone settings ................................................................................................................ 60
Management..................................................................................................................... 61

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DNS .................................................................................................................................. 62
Routing table (Transparent Mode) .................................................................................... 63
Routing table list ........................................................................................................... 63
Transparent mode route settings .................................................................................. 64
VLAN overview ................................................................................................................. 64
FortiGate units and VLANs ........................................................................................... 65
VLANs in NAT/Route mode .............................................................................................. 65
Rules for VLAN IDs....................................................................................................... 66
Rules for VLAN IP addresses ....................................................................................... 66
Adding VLAN subinterfaces .......................................................................................... 67
VLANs in Transparent mode............................................................................................. 68
Rules for VLAN IDs....................................................................................................... 70
Transparent mode virtual domains and VLANs ............................................................ 70
Transparent mode VLAN list......................................................................................... 71
Transparent mode VLAN settings................................................................................. 71
FortiGate IPv6 support...................................................................................................... 73
System DHCP ....................................................................................................... 75
Service.............................................................................................................................. 75
DHCP service settings .................................................................................................. 76
Server ............................................................................................................................... 77
DHCP server settings ................................................................................................... 78
Exclude range ................................................................................................................... 79
DHCP exclude range settings....................................................................................... 80
IP/MAC binding................................................................................................................. 80
DHCP IP/MAC binding settings .................................................................................... 81
Dynamic IP........................................................................................................................ 81
System config ...................................................................................................... 83
System time ...................................................................................................................... 83
Options.............................................................................................................................. 84
HA..................................................................................................................................... 86
HA configuration ........................................................................................................... 87
Configuring an HA cluster ............................................................................................. 93
Managing an HA cluster................................................................................................ 96
SNMP.............................................................................................................................. 100
Configuring SNMP ...................................................................................................... 100
SNMP community ....................................................................................................... 101
FortiGate MIBs............................................................................................................ 103
FortiGate traps ............................................................................................................ 104
Fortinet MIB fields ....................................................................................................... 106
Replacement messages ................................................................................................. 108
Replacement messages list ........................................................................................ 109
Changing replacement messages .............................................................................. 110
FortiManager................................................................................................................... 111

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System administration ...................................................................................... 113
Administrators ................................................................................................................. 113
Administrators list........................................................................................................ 114
Administrators options ................................................................................................ 114
Access profiles................................................................................................................ 115
Access profile list ........................................................................................................ 116
Access profile options ................................................................................................. 116
System maintenance ......................................................................................... 119
Backup and restore......................................................................................................... 119
Backing up and Restoring........................................................................................... 120
Update center ................................................................................................................. 122
Updating antivirus and attack definitions .................................................................... 124
Enabling push updates ............................................................................................... 127
Support ........................................................................................................................... 129
Sending a bug report .................................................................................................. 130
Registering a FortiGate unit ........................................................................................ 131
Shutdown........................................................................................................................ 133
System virtual domain....................................................................................... 135
Virtual domain properties ................................................................................................ 136
Exclusive virtual domain properties ............................................................................ 136
Shared configuration settings ..................................................................................... 137
Administration and management ................................................................................ 138
Virtual domains ............................................................................................................... 138
Adding a virtual domain .............................................................................................. 139
Selecting a virtual domain........................................................................................... 139
Selecting a management virtual domain..................................................................... 139
Configuring virtual domains ............................................................................................ 140
Adding interfaces, VLAN subinterfaces, and zones to a virtual domain ..................... 140
Configuring routing for a virtual domain ...................................................................... 142
Configuring firewall policies for a virtual domain......................................................... 142
Configuring IPSec VPN for a virtual domain ............................................................... 144
Router ................................................................................................................. 145
Static............................................................................................................................... 145
Static route list ............................................................................................................ 147
Static route options ..................................................................................................... 148
Policy .............................................................................................................................. 149
Policy route list............................................................................................................ 149
Policy route options..................................................................................................... 150

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RIP.................................................................................................................................. 150
General ....................................................................................................................... 151
Networks list................................................................................................................ 152
Networks options ........................................................................................................ 153
Interface list................................................................................................................. 153
Interface options ......................................................................................................... 154
Distribute list ............................................................................................................... 155
Distribute list options................................................................................................... 156
Offset list ..................................................................................................................... 157
Offset list options ........................................................................................................ 157
Router objects................................................................................................................. 158
Access list ................................................................................................................... 158
New access list ........................................................................................................... 158
New access list entry .................................................................................................. 159
Prefix list ..................................................................................................................... 159
New Prefix list ............................................................................................................. 160
New prefix list entry..................................................................................................... 161
Route-map list............................................................................................................. 161
New Route-map .......................................................................................................... 162
Route-map list entry.................................................................................................... 163
Key chain list............................................................................................................... 164
New key chain............................................................................................................. 164
Key chain list entry...................................................................................................... 165
Monitor............................................................................................................................ 166
Routing monitor list ..................................................................................................... 166
CLI configuration............................................................................................................. 167
get router info ospf ...................................................................................................... 167
get router info protocols .............................................................................................. 167
get router info rip......................................................................................................... 168
config router ospf ....................................................................................................... 168
config router static6..................................................................................................... 191
Firewall................................................................................................................ 193
Policy .............................................................................................................................. 194
How policy matching works......................................................................................... 194
Policy list ..................................................................................................................... 194
Policy options.............................................................................................................. 195
Advanced policy options ............................................................................................. 198
Configuring firewall policies ........................................................................................ 200
Policy CLI configuration .............................................................................................. 201

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Address........................................................................................................................... 202
Address list ................................................................................................................. 203
Address options .......................................................................................................... 203
Configuring addresses ................................................................................................ 204
Address group list ....................................................................................................... 205
Address group options ................................................................................................ 205
Configuring address groups........................................................................................ 206
Service............................................................................................................................ 206
Predefined service list................................................................................................. 207
Custom service list...................................................................................................... 210
Custom service options............................................................................................... 210
Configuring custom services....................................................................................... 212
Service group list ........................................................................................................ 213
Service group options ................................................................................................. 213
Configuring service groups ......................................................................................... 214
Schedule......................................................................................................................... 214
One-time schedule list ................................................................................................ 215
One-time schedule options ......................................................................................... 215
Configuring one-time schedules ................................................................................. 216
Recurring schedule list................................................................................................ 216
Recurring schedule options ........................................................................................ 217
Configuring recurring schedules ................................................................................. 217
Virtual IP ......................................................................................................................... 218
Virtual IP list ................................................................................................................ 219
Virtual IP options......................................................................................................... 219
Configuring virtual IPs................................................................................................. 220
IP pool............................................................................................................................. 222
IP pool list ................................................................................................................... 223
IP pool options ............................................................................................................ 223
Configuring IP pools.................................................................................................... 224
IP Pools for firewall policies that use fixed ports......................................................... 224
IP pools and dynamic NAT ......................................................................................... 225
Protection profile ............................................................................................................. 225
Protection profile list.................................................................................................... 226
Default protection profiles ........................................................................................... 226
Protection profile options ............................................................................................ 227
Configuring protection profiles .................................................................................... 231
CLI configuration......................................................................................................... 232
Users and authentication .................................................................................. 237
Setting authentication timeout......................................................................................... 238
Local ............................................................................................................................... 238
Local user list .............................................................................................................. 238
Local user options....................................................................................................... 238

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RADIUS .......................................................................................................................... 239
RADIUS server list ...................................................................................................... 239
RADIUS server options............................................................................................... 240
LDAP............................................................................................................................... 240
LDAP server list .......................................................................................................... 241
LDAP server options ................................................................................................... 241
User group ...................................................................................................................... 243
User group list............................................................................................................. 243
User group options...................................................................................................... 244
CLI configuration............................................................................................................. 245
peer............................................................................................................................. 245
peergrp........................................................................................................................ 246
VPN...................................................................................................................... 249
Phase 1........................................................................................................................... 250
Phase 1 list ................................................................................................................. 250
Phase 1 basic settings ................................................................................................ 251
Phase 1 advanced options.......................................................................................... 252
Configuring XAuth....................................................................................................... 253
Phase 2........................................................................................................................... 254
Phase 2 list ................................................................................................................. 254
Phase 2 basic settings ................................................................................................ 255
Phase 2 advanced options.......................................................................................... 256
Manual key...................................................................................................................... 257
Manual key list ............................................................................................................ 258
Manual key options ..................................................................................................... 258
Concentrator ................................................................................................................... 259
Concentrator list.......................................................................................................... 259
Concentrator options................................................................................................... 260
Ping Generator................................................................................................................ 260
Ping generator options................................................................................................ 261
Monitor............................................................................................................................ 261
Dialup monitor............................................................................................................. 262
Static IP and dynamic DNS monitor............................................................................ 262
PPTP............................................................................................................................... 263
Setting up a PPTP-based VPN ................................................................................... 263
Enabling PPTP and specifying a PPTP range ............................................................ 264
Configuring a Windows 2000 client for PPTP ............................................................. 265
Configuring a Windows XP client for PPTP ................................................................ 265
PPTP passthrough...................................................................................................... 266

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L2TP .............................................................................................................................. 267
Setting up a L2TP-based VPN.................................................................................... 268
Enabling L2TP and specifying an L2TP range............................................................ 268
Configuring a Windows 2000 client for L2TP.............................................................. 269
Configuring a Windows XP client for L2TP ................................................................. 270
Certificates ...................................................................................................................... 272
Viewing the certificate list............................................................................................ 273
Generating a certificate request.................................................................................. 273
Installing a signed certificate ...................................................................................... 275
Enabling VPN access for specific certificate holders ................................................. 276
CLI configuration............................................................................................................. 277
ipsec phase1............................................................................................................... 277
ipsec phase2............................................................................................................... 279
ipsec vip ...................................................................................................................... 280
Authenticating peers with preshared keys ...................................................................... 282
Gateway-to-gateway VPN............................................................................................... 282
Dialup VPN ..................................................................................................................... 283
Dynamic DNS VPN ......................................................................................................... 283
Manual key IPSec VPN................................................................................................... 284
Adding firewall policies for IPSec VPN tunnels............................................................... 284
Setting the encryption policy direction ........................................................................ 284
Setting the source address for encrypted traffic ......................................................... 284
Setting the destination address for encrypted traffic................................................... 285
Adding an IPSec firewall encryption policy ................................................................. 285
Internet browsing through a VPN tunnel ......................................................................... 285
Configuring Internet browsing through a VPN tunnel.................................................. 286
IPSec VPN in Transparent mode.................................................................................... 287
Special rules ............................................................................................................... 287
Hub and spoke VPNs...................................................................................................... 288
Configuring the hub..................................................................................................... 288
Configuring spokes ..................................................................................................... 290
Redundant IPSec VPNs.................................................................................................. 291
Configuring redundant IPSec VPNs............................................................................ 291
Configuring IPSec virtual IP addresses .......................................................................... 292
Troubleshooting .............................................................................................................. 294
IPS ....................................................................................................................... 295
Signature......................................................................................................................... 296
Predefined................................................................................................................... 296
Custom........................................................................................................................ 300
Anomaly.......................................................................................................................... 302
Anomaly CLI configuration.......................................................................................... 305
Configuring IPS logging and alert email.......................................................................... 306
Default fail open setting .................................................................................................. 306

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Antivirus ............................................................................................................. 307
File block......................................................................................................................... 308
File block list ............................................................................................................... 309
Configuring the file block list ....................................................................................... 310
Quarantine ...................................................................................................................... 310
Quarantined files list ................................................................................................... 310
Quarantined files list options....................................................................................... 311
AutoSubmit list ............................................................................................................ 312
AutoSubmit list options ............................................................................................... 312
Configuring the AutoSubmit list................................................................................... 312
Config.......................................................................................................................... 313
Config.............................................................................................................................. 314
Virus list ...................................................................................................................... 314
Config.......................................................................................................................... 314
Grayware .................................................................................................................... 315
Grayware options........................................................................................................ 315
CLI configuration............................................................................................................. 316
system global av_failopen........................................................................................... 316
system global optimize................................................................................................ 317
heuristic....................................................................................................................... 318
quarantine ................................................................................................................... 319
service http.................................................................................................................. 320
service ftp.................................................................................................................... 321
service pop3................................................................................................................ 322
service imap................................................................................................................ 322
service smtp................................................................................................................ 323
Web filter............................................................................................................. 325
Content block.................................................................................................................. 326
Web content block list ................................................................................................. 327
Web content block options.......................................................................................... 327
Configuring the web content block list ........................................................................ 328
URL block ....................................................................................................................... 328
Web URL block list...................................................................................................... 329
Web URL block options .............................................................................................. 329
Configuring the web URL block list ............................................................................. 329
Web pattern block list.................................................................................................. 330
Web pattern block options .......................................................................................... 331
Configuring web pattern block .................................................................................... 331
URL exempt.................................................................................................................... 331
URL exempt list........................................................................................................... 332
URL exempt list options .............................................................................................. 332
Configuring URL exempt............................................................................................. 332

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Category block................................................................................................................ 333
FortiGuard managed web filtering service .................................................................. 333
Category block configuration options.......................................................................... 334
Configuring web category block.................................................................................. 335
Category block reports................................................................................................ 335
Category block reports options ................................................................................... 336
Generating a category block report............................................................................. 336
Category block CLI configuration................................................................................ 336
Script filter ....................................................................................................................... 337
Web script filter options............................................................................................... 338
Spam filter .......................................................................................................... 339
IP address....................................................................................................................... 342
IP address list ............................................................................................................. 342
IP address options ...................................................................................................... 342
Configuring the IP address list .................................................................................... 342
RBL & ORDBL ................................................................................................................ 343
RBL & ORDBL list....................................................................................................... 344
RBL & ORDBL options................................................................................................ 344
Configuring the RBL & ORDBL list ............................................................................. 344
Email address ................................................................................................................. 345
Email address list........................................................................................................ 345
Email address options................................................................................................. 345
Configuring the email address list............................................................................... 345
MIME headers................................................................................................................. 346
MIME headers list ....................................................................................................... 347
MIME headers options ................................................................................................ 347
Configuring the MIME headers list.............................................................................. 347
Banned word................................................................................................................... 348
Banned word list ......................................................................................................... 348
Banned word options .................................................................................................. 349
Configuring the banned word list ................................................................................ 350
Using Perl regular expressions....................................................................................... 350
Log & Report ...................................................................................................... 353
Log config ....................................................................................................................... 354
Log Setting options ..................................................................................................... 354
Alert E-mail options..................................................................................................... 358
Log filter options.......................................................................................................... 359
Configuring log filters .................................................................................................. 362
Enabling traffic logging................................................................................................ 362

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Log access...................................................................................................................... 364
Disk log file access ..................................................................................................... 364
Viewing log messages ................................................................................................ 365
Searching log messages............................................................................................. 368
CLI configuration............................................................................................................. 369
fortilog setting.............................................................................................................. 369
syslogd setting ............................................................................................................ 370
FortiGuard categories ....................................................................................... 373
FortiGate maximum values ............................................................................... 379
Glossary ............................................................................................................. 383
Index .................................................................................................................... 387

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Introduction
FortiGate Antivirus Firewalls support network-based deployment of application-level
services, including antivirus protection and full-scan content filtering. FortiGate
Antivirus Firewalls improve network security, reduce network misuse and abuse, and
help you use communications resources more efficiently without compromising the
performance of your network. FortiGate Antivirus Firewalls are ICSA-certified for
firewall, IPSec, and antivirus services.
This chapter introduces you to FortiGate Antivirus Firewalls and the following topics:
•About FortiGate Antivirus Firewalls
•Document conventions
•FortiGate documentation
•Related documentation
•Customer service and technical support
About FortiGate Antivirus Firewalls
The FortiGate Antivirus Firewall is a dedicated easily managed security device that
delivers a full suite of capabilities that include:
• application-level services such as virus protection and content filtering,
• network-level services such as firewall, intrusion detection, VPN, and traffic
shaping.
The FortiGate Antivirus Firewall uses Fortinet’s Accelerated Behavior and Content
Analysis System (ABACAS™) technology, which leverages breakthroughs in chip
design, networking, security, and content analysis. The unique ASIC-based
architecture analyzes content and behavior in real-time, enabling key applications to
be deployed right at the network edge, where they are most effective at protecting
your networks. The FortiGate series complements existing solutions, such as host-
based antivirus protection, and enables new applications and services while greatly
lowering costs for equipment, administration, and maintenance.

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About FortiGate Antivirus Firewalls Introduction
The FortiGate-3600 model provides the
carrier-class levels of performance and
reliability demanded by large enterprises
and service providers. The
FortiGate-3600 uses multiple CPUs and
FortiASIC chips to deliver throughput of 4Gbps, meeting the needs of the most
demanding applications. Each FortiGate-3600 unit includes redundant power supplies
to minimize single-point failures, and also supports load-balanced operation and
redundant failover with no interruption in service. The FortiGate-3600 includes one
10/100 BaseTX port, four Gigabit fibre ports, and two Gigabit ethernet ports. The high
capacity, reliability, and easy management of the FortiGate-3600 makes it a natural
choice for managed service offerings.
Antivirus protection
FortiGate ICSA-certified antivirus protection scans web (HTTP), file transfer (FTP),
and email (SMTP, POP3, and IMAP) content as it passes through the FortiGate unit.
FortiGate antivirus protection uses pattern matching and heuristics to find viruses. If a
virus is found, antivirus protection removes the file containing the virus from the
content stream and forwards a replacement message to the intended recipient.
For extra protection, you can configure antivirus protection to block specified file types
from passing through the FortiGate unit. You can use the feature to stop files that
might contain new viruses.
FortiGate antivirus protection can also identify and remove known grayware
programs. Grayware programs are usually unsolicited commercial software programs
that get installed on PCs, often without the user’s consent or knowledge. Grayware
programs are generally considered an annoyance, but these programs can cause
system performance problems or be used for malicious means.
If the FortiGate unit contains a hard disk, infected or blocked files and grayware files
can be quarantined. The FortiGate administrator can download quarantined files so
that they can be virus scanned, cleaned, and forwarded to the intended recipient. You
can also configure the FortiGate unit to automatically delete quarantined files after a
specified time.
The FortiGate unit can send email alerts to system administrators when it detects and
removes a virus from a content stream. The web and email content can be in normal
network traffic or encrypted IPSec VPN traffic.
ICSA Labs has certified that FortiGate Antivirus Firewalls:
• detect 100% of the viruses listed in the current In The Wild List (www.wildlist.org),
• detect viruses in compressed files using the PKZip format,
• detect viruses in email that has been encoded using uuencode format,
• detect viruses in email that has been encoded using MIME encoding,
• log all actions taken while scanning.
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Introduction About FortiGate Antivirus Firewalls
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Web content filtering
FortiGate web content filtering can scan all HTTP content protocol streams for URLs,
URL patterns, and web page content. If there is a match between a URL on the URL
block list, or a web page contains a word or phrase that is in the content block list, the
FortiGate unit blocks the web page. The blocked web page is replaced with a
message that you can edit using the FortiGate web-based manager.
FortiGate web content filtering also supports FortiGuard web category blocking. Using
web category blocking you can restrict or allow access to web pages based on
content ratings of web pages.
You can configure URL blocking to block all or some of the pages on a web site. Using
this feature, you can deny access to parts of a web site without denying access to it
completely.
To prevent unintentionally blocking legitimate web pages, you can add URLs to an
exempt list that overrides the URL blocking and content blocking lists. The exempt list
also exempts web traffic this address from virus scanning.
Web content filtering also includes a script filter feature that can block unsecure web
content such as Java applets, cookies, and ActiveX.
Spam filtering
FortiGate spam filtering can scan all POP3, SMTP, and IMAP email content for spam.
You can configure spam filtering to filter mail according to IP address, email address,
mime headers, and content. Mail messages can be identified as spam or clear.
You can also add the names of known Real-time Blackhole List (RBL) and Open
Relay Database List (ORDBL) servers. These services contain lists of known spam
sources.
If an email message is found to be spam, the FortiGate adds an email tag to the
subject line of the email. The recipient can use the mail client software to filter
messages based on the email tag. Spam filtering can also be configured to delete
SMTP email messages identified as spam.
Firewall
The FortiGate ICSA-certified firewall protects your computer networks from Internet
threats. ICSA has granted FortiGate firewalls version 4.0 firewall certification,
providing assurance that FortiGate firewalls successfully screen and secure corporate
networks against a range of threats from public or other untrusted networks.
After basic installation of the FortiGate unit, the firewall allows users on the protected
network to access the Internet while blocking Internet access to internal networks. You
can configure the firewall to put controls on access to the Internet from the protected
networks and to allow controlled access to internal networks.

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About FortiGate Antivirus Firewalls Introduction
FortiGate policies include a range of options that:
• control all incoming and outgoing network traffic,
• control encrypted VPN traffic,
• apply antivirus protection and web content filtering,
• block or allow access for all policy options,
• control when individual policies are in effect,
• accept or deny traffic to and from individual addresses,
• control standard and user defined network services individually or in groups,
• require users to authenticate before gaining access,
• include traffic shaping to set access priorities and guarantee or limit bandwidth for
each policy,
• include logging to track connections for individual policies,
• include Network Address Translation (NAT) mode and Route mode policies,
• include mixed NAT and Route mode policies.
The FortiGate firewall can operate in NAT/Route mode or Transparent mode.
NAT/Route mode
In NAT/Route mode, the FortiGate unit is a Layer 3 device. This means that each of its
interfaces is associated with a different IP subnet and that it appears to other devices
as a router. This is how a firewall is normally deployed.
In NAT/Route mode, you can create NAT mode policies and Route mode policies.
• NAT mode policies use network address translation to hide the addresses in a
more secure network from users in a less secure network.
• Route mode policies accept or deny connections between networks without
performing address translation.
Transparent mode
In Transparent mode, the FortiGate unit does not change the Layer 3 topology. This
means that all of its interfaces are on the same IP subnet and that it appears to other
devices as a bridge. Typically, the FortiGate unit is deployed in Transparent mode to
provide antivirus and content filtering behind an existing firewall solution.
Transparent mode provides the same basic firewall protection as NAT mode. The
FortiGate unit passes or blocks the packets it receives according to firewall policies.
The FortiGate unit can be inserted in the network at any point without having to make
changes to your network or its components. However, some advanced firewall
features are available only in NAT/Route mode.

Introduction About FortiGate Antivirus Firewalls
FortiGate-3600 Administration Guide 01-28006-0011-20041105 17
VLANs and virtual domains
Fortigate Antivirus Firewalls support IEEE 802.1Q-compliant virtual LAN (VLAN) tags.
Using VLAN technology, a single FortiGate unit can provide security services to, and
control connections between, multiple security domains according to the VLAN IDs
added to VLAN packets. The FortiGate unit can recognize VLAN IDs and apply
security policies to secure network and IPSec VPN traffic between each security
domain. The FortiGate unit can also apply authentication, content filtering, and
antivirus protection to VLAN-tagged network and VPN traffic.
The FortiGate unit supports VLANs in NAT/Route and Transparent mode. In
NAT/Route mode, you enter VLAN subinterfaces to receive and send VLAN packets.
FortiGate virtual domains provide multiple logical firewalls and routers in a single
FortiGate unit. Using virtual domains, one FortiGate unit can provide exclusive firewall
and routing services to multiple networks so that traffic from each network is
effectively separated from every other network.
You can develop and manage interfaces, VLAN subinterfaces, zones, firewall policies,
routing, and VPN configuration for each virtual domain separately. For these
configuration settings, each virtual domain is functionally similar to a single FortiGate
unit. This separation simplifies configuration because you do not have to manage as
many routes or firewall policies at one time.
Intrusion Prevention System (IPS)
The FortiGate Intrusion Prevention System (IPS) combines signature and anomaly
based intrusion detection and prevention. The FortiGate unit can record suspicious
traffic in logs, can send alert email to system administrators, and can log, pass, drop,
reset, or clear suspicious packets or sessions. Both the IPS predefined signatures and
the IPS engine are upgradeable through the FortiProtect Distribution Network (FDN).
You can also create custom signatures.

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About FortiGate Antivirus Firewalls Introduction
VPN
Using FortiGate virtual private networking (VPN), you can provide a secure
connection between widely separated office networks or securely link telecommuters
or travellers to an office network.
FortiGate VPN features include the following:
• Industry standard and ICSA-certified IPSec VPN, including:
• IPSec VPN in NAT/Route and Transparent mode,
• IPSec, ESP security in tunnel mode,
• DES, 3DES (triple-DES), and AES hardware accelerated encryption,
• HMAC MD5 and HMAC SHA1 authentication and data integrity,
• AutoIKE key based on pre-shared key tunnels,
• IPSec VPN using local or CA certificates,
• Manual Keys tunnels,
• Diffie-Hellman groups 1, 2, and 5,
• Aggressive and Main Mode,
• Replay Detection,
• Perfect Forward Secrecy,
• XAuth authentication,
• Dead peer detection,
• DHCP over IPSec,
• Secure Internet browsing.
• PPTP for easy connectivity with the VPN standard supported by the most popular
operating systems.
• L2TP for easy connectivity with a more secure VPN standard, also supported by
many popular operating systems.
• Firewall policy based control of IPSec VPN traffic.
• IPSec NAT traversal so that remote IPSec VPN gateways or clients behind a NAT
can connect to an IPSec VPN tunnel.
• VPN hub and spoke using a VPN concentrator to allow VPN traffic to pass from
one tunnel to another through the FortiGate unit.
• IPSec Redundancy to create a redundant AutoIKE key IPSec VPN connection to a
remote network.
High availability
Fortinet achieves high availability (HA) using redundant hardware and the FortiGate
Clustering Protocol (FGCP). Each FortiGate unit in an HA cluster enforces the same
overall security policy and shares the same configuration settings. You can add up to
32 FortiGate units to an HA cluster. Each FortiGate unit in an HA cluster must be the
same model and must be running the same FortiOS firmware image.
FortiGate HA supports link redundancy and device redundancy.
FortiGate units can be configured to operate in active-passive (A-P) or active-active
(A-A) HA mode. Active-active and active-passive clusters can run in either NAT/Route
or Transparent mode.

Introduction About FortiGate Antivirus Firewalls
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An active-passive (A-P) HA cluster, also referred to as hot standby HA, consists of a
primary FortiGate unit that processes traffic, and one or more subordinate FortiGate
units. The subordinate FortiGate units are connected to the network and to the
primary FortiGate unit but do not process traffic.
Active-active (A-A) HA load balances virus scanning among all the FortiGate units in
the cluster. An active-active HA cluster consists of a primary FortiGate unit that
processes traffic and one or more secondary units that also process traffic. The
primary FortiGate unit uses a load balancing algorithm to distribute virus scanning to
all the FortiGate units in the HA cluster.
Secure installation, configuration, and management
The first time you power on the FortiGate unit, it is already configured with default IP
addresses and security policies. Connect to the web-based manager, set the
operating mode, and use the Setup wizard to customize FortiGate IP addresses for
your network, and the FortiGate unit is ready to protect your network. You can then
use the web-based manager to customize advanced FortiGate features.
You can also create a basic configuration using the FortiGate front panel control
buttons and LCD.
Web-based manager
Using HTTP or a secure HTTPS connection from any computer running Internet
Explorer, you can configure and manage the FortiGate unit. The web-based manager
supports multiple languages. You can configure the FortiGate unit for HTTP and
HTTPS administration from any FortiGate interface.
You can use the web-based manager to configure most FortiGate settings. You can
also use the web-based manager to monitor the status of the FortiGate unit.
Configuration changes made using the web-based manager are effective immediately
without resetting the firewall or interrupting service. Once you are satisfied with a
configuration, you can download and save it. The saved configuration can be restored
at any time.
Command line interface
You can access the FortiGate command line interface (CLI) by connecting a
management computer serial port to the FortiGate RS-232 serial console connector.
You can also use Telnet or a secure SSH connection to connect to the CLI from any
network that is connected to the FortiGate unit, including the Internet.
The CLI supports the same configuration and monitoring functionality as the
web-based manager. In addition, you can use the CLI for advanced configuration
options that are not available from the web-based manager.
This Administration Guide contains information about basic and advanced CLI
commands. For a more complete description about connecting to and using the
FortiGate CLI, see the FortiGate CLI Reference Guide.

20 01-28006-0011-20041105 Fortinet Inc.
About FortiGate Antivirus Firewalls Introduction
Logging and reporting
The FortiGate unit supports logging for various categories of traffic and configuration
changes. You can configure logging to:
• report traffic that connects to the firewall,
• report network services used,
• report traffic that was permitted by firewall policies,
• report traffic that was denied by firewall policies,
• report events such as configuration changes and other management events, IPSec
tunnel negotiation, virus detection, attacks, and web page blocking,
• report attacks detected by the IPS,
• send alert email to system administrators to report virus incidents, intrusions, and
firewall or VPN events or violations.
Logs can be sent to a remote syslog server or a WebTrends NetIQ Security Reporting
Center and Firewall Suite server using the WebTrends enhanced log format. Some
models can also save logs to an optional internal hard drive. If a hard drive is not
installed, you can configure most FortiGate units to log the most recent events and
attacks detected by the IPS to the system memory.