ZyXEL Communications ZyXEL ZyWALL 35 User manual

www.zyxel.com
ZyWALL 5/35/70 Series
Internet Security Appliance
User’s Guide
Version 4.02
3/2007
Edition 1

About This User's Guide
ZyWALL 5/35/70 Series User’s Guide 3
About This User's Guide
Intended Audience
This manual is intended for people who want to configure the ZyWALL using the web
configurator or System Management Terminal (SMT). You should have at least a basic
knowledge of TCP/IP networking concepts and topology.
Related Documentation
• Quick Start Guide
The Quick Start Guide is designed to help you get up and running right away. It contains
information on setting up your network and configuring for Internet access.
• Web Configurator Online Help
Embedded web help for descriptions of individual screens and supplementary
information.
• Supporting Disk
Refer to the included CD for support documents.
• ZyXEL Web Site
Please refer to www.zyxel.com for additional support documentation and product
certifications.
User Guide Feedback
Help us help you. Send all User Guide-related comments, questions or suggestions for
improvement to the following address, or use e-mail instead. Thank you!
The Technical Writing Team,
ZyXEL Communications Corp.,
6 Innovation Road II,
Science-Based Industrial Park,
Hsinchu, 300, Taiwan.
E-mail: [email protected]

Document Conventions
ZyWALL 5/35/70 Series User’s Guide
4
Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.
1Warnings tell you about things that could harm you or your device.
"Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.
Syntax Conventions
• The ZyWALL 5/35/70 series may be referred to as the “ZyWALL”, the “device” or the
“system” in this User’s Guide.
• Product labels, screen names, field labels and field choices are all in bold font.
• A key stroke is denoted by square brackets and uppercase text, for example, [ENTER]
means the “enter” or “return” key on your keyboard.
• “Enter” means for you to type one or more characters and then press the [ENTER] key.
“Select” or “choose” means for you to use one of the predefined choices.
• A right angle bracket ( > ) within a screen name denotes a mouse click. For example,
Maintenance > Log > Log Setting means you first click Maintenance in the navigation
panel, then the Log sub menu and finally the Log Setting tab to get to that screen.
• Units of measurement may denote the “metric” value or the “scientific” value. For
example, “k” for kilo may denote “1000” or “1024”, “M” for mega may denote “1000000”
or “1048576” and so on.
• “e.g.,” is a shorthand for “for instance”, and “i.e.,” means “that is” or “in other words”.

Document Conventions
ZyWALL 5/35/70 Series User’s Guide 5
Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. The ZyWALL icon is not an
exact representation of your device.
ZyWALL Computer Notebook computer
Server DSLAM Firewall
Telephone Switch Router

Safety Warnings
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6
Safety Warnings
1For your safety, be sure to read and follow all warning notices and instructions.
• Do NOT use this product near water, for example, in a wet basement or near a swimming
pool.
• Do NOT expose your device to dampness, dust or corrosive liquids.
• Do NOT store things on the device.
• Do NOT install, use, or service this device during a thunderstorm. There is a remote risk
of electric shock from lightning.
• Connect ONLY suitable accessories to the device.
• Do NOT open the device or unit. Opening or removing covers can expose you to
dangerous high voltage points or other risks. ONLY qualified service personnel should
service or disassemble this device. Please contact your vendor for further information.
• Make sure to connect the cables to the correct ports.
• Place connecting cables carefully so that no one will step on them or stumble over them.
• Always disconnect all cables from this device before servicing or disassembling.
• Use ONLY an appropriate power adaptor or cord for your device.
• Connect the power adaptor or cord to the right supply voltage (for example, 110V AC in
North America or 230V AC in Europe).
• Do NOT allow anything to rest on the power adaptor or cord and do NOT place the
product where anyone can walk on the power adaptor or cord.
• Do NOT use the device if the power adaptor or cord is damaged as it might cause
electrocution.
• If the power adaptor or cord is damaged, remove it from the power outlet.
• Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a
new one.
• Do not use the device outside, and make sure all the connections are indoors. There is a
remote risk of electric shock from lightning.
• CAUTION: RISK OF EXPLOSION IF BATTERY (on the motherboard) IS REPLACED
BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO
THE INSTRUCTIONS. Dispose them at the applicable collection point for the recycling
of electrical and electronic equipment. For detailed information about recycling of this
product, please contact your local city office, your household waste disposal service or the
store where you purchased the product.
• Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your
device.
• Fuse Warning! Replace a fuse only with a fuse of the same type and rating.
This product is recyclable. Dispose of it properly.

Safety Warnings
ZyWALL 5/35/70 Series User’s Guide 7

Safety Warnings
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Contents Overview
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Contents Overview
Introduction ............................................................................................................................ 53
Getting to Know Your ZyWALL .................................................................................................. 55
Introducing the Web Configurator .............................................................................................. 61
Wizard Setup ............................................................................................................................. 85
Tutorial ..................................................................................................................................... 105
Registration ..............................................................................................................................119
Network ................................................................................................................................. 125
LAN Screens ........................................................................................................................... 127
Bridge Screens ........................................................................................................................ 139
WAN Screens .......................................................................................................................... 145
DMZ Screens ........................................................................................................................... 179
Wireless LAN ........................................................................................................................... 189
Security ................................................................................................................................. 219
Firewall .................................................................................................................................... 221
Intrusion Detection and Prevention (IDP) ................................................................................ 251
Configuring IDP ....................................................................................................................... 255
Anti-Virus ................................................................................................................................. 271
Anti-Spam ................................................................................................................................ 283
Content Filtering Screens ........................................................................................................ 297
Content Filtering Reports ......................................................................................................... 315
IPSec VPN ............................................................................................................................... 323
Certificates ............................................................................................................................... 361
Authentication Server .............................................................................................................. 387
Advanced .............................................................................................................................. 391
Network Address Translation (NAT) ........................................................................................ 393
Static Route ..............................................................................................................................411
Policy Route ............................................................................................................................ 415
Bandwidth Management .......................................................................................................... 421
DNS ......................................................................................................................................... 437
Remote Management ..............................................................................................................449
UPnP ....................................................................................................................................... 471
ALG Screen ............................................................................................................................. 481

Contents Overview
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Reports, Logs and Maintenance ......................................................................................... 487
Reports .................................................................................................................................... 489
Logs Screens ........................................................................................................................... 501
Maintenance ............................................................................................................................ 529
SMT and Troubleshooting ................................................................................................... 545
Introducing the SMT ................................................................................................................ 547
SMT Menu 1 - General Setup .................................................................................................. 555
WAN and Dial Backup Setup ................................................................................................... 561
LAN Setup ............................................................................................................................... 575
Internet Access ........................................................................................................................ 581
DMZ Setup .............................................................................................................................. 587
Route Setup ............................................................................................................................. 591
Wireless Setup ........................................................................................................................ 595
Remote Node Setup ................................................................................................................ 601
IP Static Route Setup ...............................................................................................................611
Network Address Translation (NAT) ........................................................................................ 615
Introducing the ZyWALL Firewall ............................................................................................. 635
Filter Configuration .................................................................................................................. 637
SNMP Configuration ................................................................................................................ 653
System Information & Diagnosis ............................................................................................. 655
Firmware and Configuration File Maintenance ........................................................................ 667
System Maintenance Menus 8 to 10 ....................................................................................... 681
Remote Management ..............................................................................................................689
IP Policy Routing ..................................................................................................................... 693
Call Scheduling ........................................................................................................................ 701
Troubleshooting ....................................................................................................................... 705
Appendices and Index ......................................................................................................... 711

Table of Contents
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Table of Contents
About This User's Guide .......................................................................................................... 3
Document Conventions............................................................................................................4
Safety Warnings........................................................................................................................ 6
Contents Overview ................................................................................................................... 9
Table of Contents.................................................................................................................... 11
List of Figures ......................................................................................................................... 31
List of Tables........................................................................................................................... 45
Part I: Introduction................................................................................. 53
Chapter 1
Getting to Know Your ZyWALL.............................................................................................. 55
1.1 ZyWALL Internet Security Appliance Overview ................................................................... 55
1.2 ZyWALL Features ................................................................................................................ 55
1.3 Ways to Manage the ZyWALL ............................................................................................. 56
1.4 Good Habits for Managing the ZyWALL .............................................................................. 56
1.5 Applications for the ZyWALL ............................................................................................... 57
1.5.1 Secure Broadband Internet Access via Cable or DSL Modem .................................. 57
1.5.2 VPN Application ......................................................................................................... 57
1.5.3 3G WAN Application (ZyWALL 5 Only) ...................................................................... 58
1.5.4 Front Panel Lights ...................................................................................................... 58
Chapter 2
Introducing the Web Configurator ........................................................................................ 61
2.1 Web Configurator Overview ................................................................................................. 61
2.2 Accessing the ZyWALL Web Configurator .......................................................................... 61
2.3 Resetting the ZyWALL ......................................................................................................... 63
2.3.1 Procedure To Use The Reset Button ......................................................................... 63
2.3.2 Uploading a Configuration File Via Console Port ....................................................... 63
2.4 Navigating the ZyWALL Web Configurator .......................................................................... 64
2.4.1 Title Bar ...................................................................................................................... 64
2.4.2 Main Window ..............................................................................................................65
2.4.3 HOME Screen: Router Mode ................................................................................... 65

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2.4.4 HOME Screen: Bridge Mode .................................................................................... 69
2.4.5 Navigation Panel ........................................................................................................ 73
2.4.6 Port Statistics ........................................................................................................... 78
2.4.7 Show Statistics: Line Chart ........................................................................................ 79
2.4.8 DHCP Table Screen ................................................................................................ 80
2.4.9 VPN Status ................................................................................................................. 81
2.4.10 Bandwidth Monitor .................................................................................................. 82
Chapter 3
Wizard Setup ........................................................................................................................... 85
3.1 Wizard Setup Overview ...................................................................................................... 85
3.2 Internet Access ................................................................................................................... 85
3.2.1 ISP Parameters .......................................................................................................... 86
3.2.2 Internet Access Wizard: Second Screen .................................................................... 90
3.2.3 Internet Access Wizard: Registration ......................................................................... 91
3.2.4 Internet Access Wizard: Status .................................................................................. 93
3.2.5 Internet Access Wizard: Service Activation ............................................................... 94
3.3 VPN Wizard Gateway Setting .............................................................................................. 95
3.4 VPN Wizard Network Setting ............................................................................................... 96
3.5 VPN Wizard IKE Tunnel Setting (IKE Phase 1) ................................................................... 97
3.6 VPN Wizard IPSec Setting (IKE Phase 2) ........................................................................... 99
3.7 VPN Wizard Status Summary ............................................................................................ 100
3.8 VPN Wizard Setup Complete ............................................................................................ 103
Chapter 4
Tutorial ................................................................................................................................... 105
4.1 Security Settings for VPN Traffic ....................................................................................... 105
4.1.1 IDP for From VPN Traffic Example .......................................................................... 105
4.1.2 IDP for To VPN Traffic Example ............................................................................... 107
4.2 Firewall Rule for VPN Example ......................................................................................... 108
4.2.1 Configuring the VPN Rule ........................................................................................ 109
4.2.2 Configuring the Firewall Rules ..................................................................................112
4.3 How to Set up a 3G WAN Connection ................................................................................116
4.3.1 Configuring 3G WAN Settings ...................................................................................116
4.3.2 Configuring Load Balancing ......................................................................................117
4.3.3 Inserting a 3G Card ...................................................................................................117
4.3.4 Checking WAN Connections .....................................................................................117
Chapter 5
Registration ........................................................................................................................... 119
5.1 myZyXEL.com overview .....................................................................................................119
5.1.1 Subscription Services Available on the ZyWALL ......................................................119
5.2 Registration ....................................................................................................................... 120

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5.3 Service ............................................................................................................................... 122
Part II: Network..................................................................................... 125
Chapter 6
LAN Screens.......................................................................................................................... 127
6.1 LAN, WAN and the ZyWALL .............................................................................................. 127
6.2 IP Address and Subnet Mask ............................................................................................ 127
6.2.1 Private IP Addresses ................................................................................................ 128
6.3 DHCP ................................................................................................................................ 129
6.3.1 IP Pool Setup ........................................................................................................... 129
6.4 RIP Setup .......................................................................................................................... 129
6.5 Multicast ............................................................................................................................ 129
6.6 WINS ................................................................................................................................. 130
6.7 LAN .................................................................................................................................... 130
6.8 LAN Static DHCP ............................................................................................................... 133
6.9 LAN IP Alias .................................................................................................................... 134
6.10 LAN Port Roles ................................................................................................................ 136
Chapter 7
Bridge Screens...................................................................................................................... 139
7.1 Bridge Loop ....................................................................................................................... 139
7.2 Spanning Tree Protocol (STP) ........................................................................................... 140
7.2.1 Rapid STP ................................................................................................................140
7.2.2 STP Terminology ...................................................................................................... 140
7.2.3 How STP Works ....................................................................................................... 140
7.2.4 STP Port States ........................................................................................................ 141
7.3 Bridge ................................................................................................................................ 141
7.4 Bridge Port Roles ............................................................................................................. 143
Chapter 8
WAN Screens......................................................................................................................... 145
8.1 WAN Overview .................................................................................................................. 145
8.2 Multiple WAN ..................................................................................................................... 145
8.3 Load Balancing Introduction .............................................................................................. 146
8.4 Load Balancing Algorithms ................................................................................................ 146
8.4.1 Least Load First ....................................................................................................... 146
8.4.2 Weighted Round Robin ............................................................................................ 147
8.4.3 Spillover .................................................................................................................... 148
8.5 TCP/IP Priority (Metric) ...................................................................................................... 149
8.6 WAN General ..................................................................................................................... 149

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8.7 Configuring Load Balancing .............................................................................................. 153
8.7.1 Least Load First ....................................................................................................... 153
8.7.2 Weighted Round Robin ............................................................................................ 154
8.7.3 Spillover .................................................................................................................... 154
8.8 WAN IP Address Assignment ............................................................................................ 155
8.9 DNS Server Address Assignment ..................................................................................... 156
8.10 WAN MAC Address ......................................................................................................... 156
8.11 WAN ............................................................................................................................... 157
8.11.1 WAN Ethernet Encapsulation ................................................................................. 157
8.11.2 PPPoE Encapsulation ............................................................................................ 160
8.11.3 PPTP Encapsulation ............................................................................................... 163
8.12 3G WAN .......................................................................................................................... 166
8.13 Traffic Redirect ........................................................................................................... 170
8.14 Configuring Traffic Redirect ............................................................................................. 170
8.15 Configuring Dial Backup .................................................................................................. 171
8.16 Advanced Modem Setup ............................................................................................... 175
8.16.1 AT Command Strings ............................................................................................. 175
8.16.2 DTR Signal ............................................................................................................. 175
8.16.3 Response Strings ................................................................................................... 175
8.17 Configuring Advanced Modem Setup .............................................................................. 175
Chapter 9
DMZ Screens ......................................................................................................................... 179
9.1 DMZ ................................................................................................................................. 179
9.2 Configuring DMZ ............................................................................................................... 179
9.3 DMZ Static DHCP ............................................................................................................ 182
9.4 DMZ IP Alias .................................................................................................................... 183
9.5 DMZ Public IP Address Example ...................................................................................... 185
9.6 DMZ Private and Public IP Address Example ................................................................... 186
9.7 DMZ Port Roles ............................................................................................................... 187
Chapter 10
Wireless LAN......................................................................................................................... 189
10.1 Wireless LAN Introduction ............................................................................................... 189
10.1.1 Additional Installation Requirements for Using 802.1x ........................................... 189
10.2 Configuring WLAN ......................................................................................................... 189
10.3 WLAN Static DHCP ....................................................................................................... 192
10.4 WLAN IP Alias ............................................................................................................... 193
10.5 WLAN Port Roles ........................................................................................................... 195
10.6 Wireless Security ............................................................................................................. 197
10.6.1 Encryption ..............................................................................................................198
10.6.2 Authentication ........................................................................................................ 198
10.6.3 Restricted Access .................................................................................................. 198

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10.6.4 Hide ZyWALL Identity ............................................................................................. 199
10.7 Security Parameters Summary ........................................................................................ 199
10.8 WEP Encryption .............................................................................................................. 199
10.9 802.1x Overview .............................................................................................................. 199
10.9.1 Introduction to RADIUS .......................................................................................... 200
10.9.2 EAP Authentication Overview ................................................................................ 200
10.10 Dynamic WEP Key Exchange ....................................................................................... 201
10.11 Introduction to WPA ....................................................................................................... 202
10.11.1 User Authentication .............................................................................................. 202
10.11.2 Encryption ............................................................................................................ 202
10.12 WPA-PSK Application Example ..................................................................................... 203
10.13 Introduction to RADIUS ................................................................................................. 203
10.14 WPA with RADIUS Application Example ....................................................................... 203
10.15 Wireless Client WPA Supplicants .................................................................................. 204
10.16 Wireless Card .............................................................................................................. 204
10.16.1 Static WEP ........................................................................................................... 207
10.16.2 WPA-PSK ............................................................................................................. 208
10.16.3 WPA ..................................................................................................................... 209
10.16.4 IEEE 802.1x + Dynamic WEP .............................................................................. 210
10.16.5 IEEE 802.1x + Static WEP ....................................................................................211
10.16.6 IEEE 802.1x + No WEP ....................................................................................... 213
10.16.7 No Access 802.1x + Static WEP .......................................................................... 214
10.16.8 No Access 802.1x + No WEP .............................................................................. 215
10.17 MAC Filter ..................................................................................................................... 216
Part III: Security.................................................................................... 219
Chapter 11
Firewall................................................................................................................................... 221
11.1 Firewall Overview ............................................................................................................ 221
11.2 Packet Direction Matrix .................................................................................................... 222
11.3 Packet Direction Examples .............................................................................................. 223
11.3.1 To VPN Packet Direction ........................................................................................ 224
11.3.2 From VPN Packet Direction ................................................................................... 226
11.3.3 From VPN To VPN Packet Direction ...................................................................... 227
11.4 Security Considerations ...................................................................................................229
11.5 Firewall Rules Example ................................................................................................... 229
11.6 Asymmetrical Routes .......................................................................................................231
11.6.1 Asymmetrical Routes and IP Alias ......................................................................... 231
11.7 Firewall Default Rule (Router Mode) ................................................................................ 232
11.8 Firewall Default Rule (Bridge Mode) .............................................................................. 234

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11.9 Firewall Rule Summary ................................................................................................... 236
11.9.1 Firewall Edit Rule .............................................................................................. 237
11.10 Anti-Probing ............................................................................................................... 240
11.11 Firewall Thresholds ..................................................................................................... 241
11.11.1 Threshold Values .................................................................................................. 242
11.12 Threshold Screen ........................................................................................................... 242
11.13 Service .......................................................................................................................... 244
11.13.1 Firewall Edit Custom Service .............................................................................. 245
11.14 My Service Firewall Rule Example ................................................................................ 246
Chapter 12
Intrusion Detection and Prevention (IDP)........................................................................... 251
12.1 Introduction to IDP ...................................................................................................... 251
12.1.1 Firewalls and Intrusions ......................................................................................... 252
12.1.2 IDS and IDP .......................................................................................................... 252
12.1.3 Host IDP ................................................................................................................ 252
12.1.4 Network IDP .......................................................................................................... 252
12.1.5 Example Intrusions ................................................................................................. 253
12.1.6 ZyWALL IDP .......................................................................................................... 254
Chapter 13
Configuring IDP..................................................................................................................... 255
13.1 Overview .......................................................................................................................... 255
13.1.1 Interfaces ............................................................................................................... 255
13.2 General Setup ................................................................................................................. 256
13.3 IDP Signatures ................................................................................................................ 258
13.3.1 Attack Types ........................................................................................................... 258
13.3.2 Intrusion Severity ................................................................................................... 259
13.3.3 Signature Actions ................................................................................................... 259
13.3.4 Configuring IDP Signatures .................................................................................... 260
13.3.5 Query View ............................................................................................................ 262
13.4 Update ............................................................................................................................ 266
13.4.1 mySecurityZone ..................................................................................................... 266
13.4.2 Configuring IDP Update ......................................................................................... 267
13.5 Backup and Restore ........................................................................................................269
Chapter 14
Anti-Virus............................................................................................................................... 271
14.1 Anti-Virus Overview ........................................................................................................ 271
14.1.1 Types of Computer Viruses ................................................................................... 271
14.1.2 Computer Virus Infection and Prevention .............................................................. 271
14.1.3 Types of Anti-Virus Scanner .................................................................................. 272
14.2 Introduction to the ZyWALL Anti-Virus Scanner .............................................................. 272

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14.2.1 How the ZyWALL Anti-Virus Scanner Works ........................................................ 272
14.2.2 Notes About the ZyWALL Anti-Virus ...................................................................... 273
14.3 General Anti-Virus Setup ................................................................................................. 274
14.4 Signature Searching ........................................................................................................ 276
14.4.1 Signature Search Example .................................................................................... 278
14.5 Signature Update ........................................................................................................... 279
14.5.1 mySecurityZone ..................................................................................................... 280
14.5.2 Configuring Anti-virus Update ............................................................................... 280
14.6 Backup and Restore .......................................................................................................282
Chapter 15
Anti-Spam .............................................................................................................................. 283
15.1 Anti-Spam Overview .....................................................................................................283
15.1.1 Anti-Spam External Database ................................................................................ 283
15.1.2 Spam Threshold ..................................................................................................... 285
15.1.3 Phishing ................................................................................................................. 285
15.1.4 Whitelist .................................................................................................................. 286
15.1.5 Blacklist .................................................................................................................. 286
15.1.6 SMTP and POP3 .................................................................................................... 286
15.1.7 MIME Headers ....................................................................................................... 286
15.2 Anti-Spam General Screen .............................................................................................. 287
15.3 Anti-Spam External DB Screen .................................................................................. 289
15.4 Anti-Spam Lists Screen .................................................................................................. 291
15.5 Anti-Spam Lists Edit Screen .......................................................................................... 293
Chapter 16
Content Filtering Screens .................................................................................................... 297
16.1 Content Filtering Overview .............................................................................................. 297
16.1.1 Restrict Web Features ........................................................................................... 297
16.1.2 Create a Filter List .................................................................................................. 297
16.1.3 Customize Web Site Access ................................................................................. 297
16.2 Content Filter General Screen ........................................................................................ 297
16.3 Content Filtering with an External Database ................................................................... 300
16.4 Content Filter Categories ..............................................................................................300
16.5 Content Filter Customization ........................................................................................ 309
16.6 Customizing Keyword Blocking URL Checking ................................................................311
16.6.1 Domain Name or IP Address URL Checking ......................................................... 312
16.6.2 Full Path URL Checking ......................................................................................... 312
16.6.3 File Name URL Checking ....................................................................................... 312
16.7 Content Filtering Cache .................................................................................................312
Chapter 17
Content Filtering Reports..................................................................................................... 315

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17.1 Checking Content Filtering Activation .............................................................................. 315
17.2 Viewing Content Filtering Reports ................................................................................... 315
17.3 Web Site Submission .......................................................................................................320
Chapter 18
IPSec VPN.............................................................................................................................. 323
18.1 IPSec VPN Overview ..................................................................................................... 323
18.1.1 IKE SA Overview .................................................................................................... 324
18.2 VPN Rules (IKE) .............................................................................................................. 325
18.3 IKE SA Setup .................................................................................................................. 327
18.3.1 IKE SA Proposal .................................................................................................... 327
18.4 Additional IPSec VPN Topics ........................................................................................... 331
18.4.1 SA Life Time ........................................................................................................... 331
18.4.2 IPSec High Availability ........................................................................................... 332
18.4.3 Encryption and Authentication Algorithms ............................................................. 333
18.5 VPN Rules (IKE) Gateway Policy Edit ............................................................................. 333
18.6 IPSec SA Overview .....................................................................................................339
18.6.1 Local Network and Remote Network ...................................................................... 339
18.6.2 Active Protocol ....................................................................................................... 339
18.6.3 Encapsulation ......................................................................................................... 340
18.6.4 IPSec SA Proposal and Perfect Forward Secrecy ................................................. 340
18.7 VPN Rules (IKE): Network Policy Edit ............................................................................ 341
18.8 VPN Rules (IKE): Network Policy Move ........................................................................ 345
18.9 IPSec SA Using Manual Keys ..................................................................................... 346
18.9.1 IPSec SA Proposal Using Manual Keys ................................................................. 347
18.9.2 Authentication and the Security Parameter Index (SPI) ......................................... 347
18.10 VPN Rules (Manual) ...................................................................................................... 347
18.11 VPN Rules (Manual): Edit ........................................................................................... 348
18.12 VPN SA Monitor .......................................................................................................... 351
18.13 VPN Global Setting ....................................................................................................... 352
18.14 Telecommuter VPN/IPSec Examples ............................................................................ 354
18.14.1 Telecommuters Sharing One VPN Rule Example ................................................ 354
18.14.2 Telecommuters Using Unique VPN Rules Example ............................................. 354
18.15 VPN and Remote Management ..................................................................................... 356
18.16 Hub-and-spoke VPN ...................................................................................................... 356
18.16.1 Hub-and-spoke VPN Example ............................................................................. 357
18.16.2 Hub-and-spoke Example VPN Rule Addresses ................................................... 358
18.16.3 Hub-and-spoke VPN Requirements and Suggestions ......................................... 358
Chapter 19
Certificates ............................................................................................................................ 361
19.1 Certificates Overview ....................................................................................................... 361
19.1.1 Advantages of Certificates ..................................................................................... 362

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19.2 Self-signed Certificates .................................................................................................... 362
19.3 Verifying a Certificate ....................................................................................................... 362
19.3.1 Checking the Fingerprint of a Certificate on Your Computer .................................. 362
19.4 Configuration Summary ................................................................................................... 363
19.5 My Certificates ................................................................................................................ 364
19.6 My Certificate Details ..................................................................................................... 366
19.7 My Certificate Export ...................................................................................................... 368
19.7.1 Certificate File Export Formats ............................................................................... 368
19.8 My Certificate Import ..................................................................................................... 369
19.8.1 Certificate File Formats .......................................................................................... 370
19.9 My Certificate Create ..................................................................................................... 372
19.10 Trusted CAs ................................................................................................................. 374
19.11 Trusted CA Details ........................................................................................................ 375
19.12 Trusted CA Import ....................................................................................................... 378
19.13 Trusted Remote Hosts ................................................................................................. 379
19.14 Trusted Remote Hosts Import ...................................................................................... 381
19.15 Trusted Remote Host Certificate Details ..................................................................... 382
19.16 Directory Servers .......................................................................................................... 384
19.17 Directory Server Add or Edit ........................................................................................ 385
Chapter 20
Authentication Server...........................................................................................................387
20.1 Authentication Server Overview ...................................................................................... 387
20.1.1 Local User Database .............................................................................................. 387
20.1.2 RADIUS ..................................................................................................................387
20.2 Local User Database .....................................................................................................387
20.3 RADIUS ......................................................................................................................... 389
Part IV: Advanced ................................................................................ 391
Chapter 21
Network Address Translation (NAT).................................................................................... 393
21.1 NAT Overview ................................................................................................................ 393
21.1.1 NAT Definitions ...................................................................................................... 393
21.1.2 What NAT Does ..................................................................................................... 394
21.1.3 How NAT Works ..................................................................................................... 394
21.1.4 NAT Application ...................................................................................................... 395
21.1.5 Port Restricted Cone NAT ...................................................................................... 396
21.1.6 NAT Mapping Types ............................................................................................... 396
21.2 Using NAT ........................................................................................................................ 397
21.2.1 SUA (Single User Account) Versus NAT ................................................................ 397

Table of Contents
ZyWALL 5/35/70 Series User’s Guide
20
21.3 NAT Overview Screen ..................................................................................................... 398
21.4 NAT Address Mapping ................................................................................................... 399
21.4.1 What NAT Does ..................................................................................................... 400
21.4.2 NAT Address Mapping Edit .................................................................................. 401
21.5 Port Forwarding .............................................................................................................. 402
21.5.1 Default Server IP Address ...................................................................................... 403
21.5.2 Port Forwarding: Services and Port Numbers ........................................................ 403
21.5.3 Configuring Servers Behind Port Forwarding (Example) ....................................... 404
21.5.4 NAT and Multiple WAN ........................................................................................... 404
21.5.5 Port Translation ...................................................................................................... 404
21.6 Port Forwarding Screen ................................................................................................... 405
21.7 Port Triggering ............................................................................................................... 407
Chapter 22
Static Route ........................................................................................................................... 411
22.1 IP Static Route ...............................................................................................................411
22.2 IP Static Route ..................................................................................................................411
22.2.1 IP Static Route Edit .............................................................................................. 413
Chapter 23
Policy Route .......................................................................................................................... 415
23.1 Policy Route ................................................................................................................... 415
23.2 Benefits ............................................................................................................................ 415
23.3 Routing Policy .................................................................................................................. 415
23.4 IP Routing Policy Setup ...................................................................................................416
23.5 Policy Route Edit ............................................................................................................ 417
Chapter 24
Bandwidth Management....................................................................................................... 421
24.1 Bandwidth Management Overview ................................................................................. 421
24.2 Bandwidth Classes and Filters ........................................................................................ 421
24.3 Proportional Bandwidth Allocation ................................................................................... 422
24.4 Application-based Bandwidth Management .................................................................... 422
24.5 Subnet-based Bandwidth Management .......................................................................... 422
24.6 Application and Subnet-based Bandwidth Management ................................................. 422
24.7 Scheduler ........................................................................................................................ 423
24.7.1 Priority-based Scheduler ........................................................................................ 423
24.7.2 Fairness-based Scheduler ..................................................................................... 423
24.7.3 Maximize Bandwidth Usage ................................................................................... 423
24.7.4 Reserving Bandwidth for Non-Bandwidth Class Traffic .......................................... 423
24.7.5 Maximize Bandwidth Usage Example .................................................................... 424
24.8 Bandwidth Borrowing .......................................................................................................425
24.8.1 Bandwidth Borrowing Example .............................................................................. 425