ZyXEL Communications ZyXEL ZyWALL 35 User manual

www.zyxel.com
ZyWALL 5/35/70 Series
Internet Security Appliance
User’s Guide
Version 4.03
1/2008
Edition 1
DEFAULT LOGIN
IP Address http://192.168.1.1
Password 1234

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.
• CLI Reference Guide
The CLI Reference Guide explains how to use the Command-Line Interface (CLI) to
configure the ZyWALL.
• 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 Firewall Telephone
Switch Router

Safety Warnings
ZyWALL 5/35/70 Series User’s Guide
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 remove the plug and connect it to a power outlet by itself; always attach the plug
to the power adaptor first before connecting it to a power outlet.
• 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.

Safety Warnings
ZyWALL 5/35/70 Series User’s Guide 7
This product is recyclable. Dispose of it properly.

Safety Warnings
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Contents Overview
ZyWALL 5/35/70 Series User’s Guide 9
Contents Overview
Introduction ............................................................................................................................53
Getting to Know Your ZyWALL .................................................................................................. 55
Introducing the Web Configurator ..............................................................................................61
Wizard Setup ............................................................................................................................. 87
Tutorials ................................................................................................................................... 109
Registration ............................................................................................................................. 141
Network .................................................................................................................................147
LAN Screens ........................................................................................................................... 149
Bridge Screens ........................................................................................................................ 161
WAN Screens .......................................................................................................................... 167
DMZ Screens ........................................................................................................................... 203
WLAN ...................................................................................................................................... 213
Security .................................................................................................................................241
Firewall .................................................................................................................................... 243
Intrusion Detection and Prevention (IDP) ................................................................................ 275
Configuring IDP ....................................................................................................................... 279
Anti-Virus ................................................................................................................................. 295
Anti-Spam ................................................................................................................................ 307
Content Filtering Screens ........................................................................................................321
Content Filtering Reports ......................................................................................................... 343
IPSec VPN ............................................................................................................................... 351
Certificates ............................................................................................................................... 395
Authentication Server .............................................................................................................. 425
Advanced ..............................................................................................................................429
Network Address Translation (NAT) ........................................................................................ 431
Static Route ............................................................................................................................. 449
Policy Route ............................................................................................................................ 453
Bandwidth Management ..........................................................................................................459
DNS ......................................................................................................................................... 475
Remote Management ..............................................................................................................487
UPnP ....................................................................................................................................... 515
Custom Application ..................................................................................................................525
ALG Screen ............................................................................................................................. 527

Contents Overview
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Reports, Logs and Maintenance .........................................................................................533
Reports .................................................................................................................................... 535
Logs Screens ........................................................................................................................... 547
Maintenance ............................................................................................................................575
SMT and Troubleshooting ...................................................................................................593
Introducing the SMT ................................................................................................................ 595
SMT Menu 1 - General Setup .................................................................................................. 603
WAN and Dial Backup Setup ...................................................................................................609
LAN Setup ............................................................................................................................... 623
Internet Access ........................................................................................................................ 629
DMZ Setup .............................................................................................................................. 635
Route Setup ............................................................................................................................. 639
Wireless Setup ........................................................................................................................ 643
Remote Node Setup ................................................................................................................ 649
IP Static Route Setup ..............................................................................................................659
Network Address Translation (NAT) ........................................................................................ 663
Introducing the ZyWALL Firewall ............................................................................................. 683
Filter Configuration .................................................................................................................. 685
SNMP Configuration ................................................................................................................ 701
System Information & Diagnosis ............................................................................................. 703
Firmware and Configuration File Maintenance ........................................................................ 715
System Maintenance Menus 8 to 10 ....................................................................................... 729
Remote Management ..............................................................................................................735
IP Policy Routing ..................................................................................................................... 739
Call Scheduling ........................................................................................................................ 747
Troubleshooting ....................................................................................................................... 751
Product Specifications ............................................................................................................. 757
Appendices and Index .........................................................................................................765

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 .................................................................................... 71
2.4.5 Navigation Panel ........................................................................................................74
2.4.6 Port Statistics ........................................................................................................... 80
2.4.7 Show Statistics: Line Chart ........................................................................................ 81
2.4.8 DHCP Table Screen ................................................................................................ 82
2.4.9 VPN Status ................................................................................................................. 83
2.4.10 Bandwidth Monitor .................................................................................................. 84
Chapter 3
Wizard Setup...........................................................................................................................87
3.1 Wizard Setup Overview ...................................................................................................... 87
3.2 Internet Access ................................................................................................................... 88
3.2.1 ISP Parameters .......................................................................................................... 88
3.2.2 Internet Access Wizard: Second Screen .................................................................... 92
3.2.3 Internet Access Wizard: Registration ......................................................................... 93
3.2.4 Internet Access Wizard: Status .................................................................................. 94
3.2.5 Internet Access Wizard: Service Activation ............................................................... 95
3.3 VPN Wizard Gateway Setting .............................................................................................. 96
3.4 VPN Wizard Network Setting ............................................................................................... 97
3.5 VPN Wizard IKE Tunnel Setting (IKE Phase 1) ................................................................... 99
3.6 VPN Wizard IPSec Setting (IKE Phase 2) ......................................................................... 100
3.7 VPN Wizard Status Summary ............................................................................................ 102
3.8 VPN Wizard Setup Complete ............................................................................................ 104
3.9 Anti-Spam Wizard: Email Server Location Setting ............................................................104
3.10 Anti-Spam Wizard: Direction Recommendations ............................................................ 105
3.11 Anti-Spam Wizard: Direction Configuration ...................................................................... 106
3.12 Anti-Spam Wizard: Setup Complete ................................................................................ 108
Chapter 4
Tutorials.................................................................................................................................109
4.1 Dynamic VPN Rule Configuration .....................................................................................109
4.1.1 Configure Bob’s User Account ..................................................................................110
4.1.2 VPN Gateway and Network Policy Configuration .....................................................110
4.1.3 Configure Zero Configuration Mode on ZyWALL B ..................................................116
4.1.4 Testing Your VPN Configuration ................................................................................117
4.1.5 Using the Dynamic VPN Rule for More VPN Tunnels ...............................................119
4.2 Security Settings for VPN Traffic ........................................................................................119
4.2.1 IDP for From VPN Traffic Example ..........................................................................120
4.2.2 IDP for To VPN Traffic Example ............................................................................... 121
4.3 Firewall Rule for VPN Example ......................................................................................... 122
4.3.1 Configuring the VPN Rule ........................................................................................ 123
4.3.2 Configuring the Firewall Rules ................................................................................. 127
4.4 How to Set up a 3G WAN Connection ............................................................................... 130

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4.4.1 Inserting a 3G Card .................................................................................................. 130
4.4.2 Configuring 3G WAN Settings .................................................................................. 131
4.4.3 Checking WAN Connections .................................................................................... 132
4.5 Configuring Load Balancing ..............................................................................................132
4.6 Configuring Content Filtering .............................................................................................133
4.6.1 Enable Content Filtering ........................................................................................... 133
4.6.2 Block Categories of Web Content ............................................................................ 134
4.6.3 Assign Bob’s Computer a Specific IP Address ......................................................... 136
4.6.4 Create a Content Filter Policy for Bob ...................................................................... 136
4.6.5 Set the Content Filter Schedule ............................................................................... 137
4.6.6 Block Categories of Web Content for Bob ............................................................... 138
Chapter 5
Registration...........................................................................................................................141
5.1 myZyXEL.com overview .................................................................................................... 141
5.1.1 Subscription Services Available on the ZyWALL ..................................................... 141
5.2 Registration .......................................................................................................................142
5.3 Service ............................................................................................................................... 144
Part II: Network..................................................................................... 147
Chapter 6
LAN Screens..........................................................................................................................149
6.1 LAN, WAN and the ZyWALL .............................................................................................. 149
6.2 IP Address and Subnet Mask ............................................................................................ 149
6.2.1 Private IP Addresses ................................................................................................ 150
6.3 DHCP ................................................................................................................................ 151
6.3.1 IP Pool Setup ........................................................................................................... 151
6.4 RIP Setup .......................................................................................................................... 151
6.5 Multicast ............................................................................................................................ 151
6.6 WINS .................................................................................................................................152
6.7 LAN .................................................................................................................................... 152
6.8 LAN Static DHCP ...............................................................................................................155
6.9 LAN IP Alias ....................................................................................................................156
6.10 LAN Port Roles ................................................................................................................ 158
Chapter 7
Bridge Screens......................................................................................................................161
7.1 Bridge Loop ....................................................................................................................... 161
7.2 Spanning Tree Protocol (STP) ........................................................................................... 162
7.2.1 Rapid STP ................................................................................................................162

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7.2.2 STP Terminology ...................................................................................................... 162
7.2.3 How STP Works ....................................................................................................... 162
7.2.4 STP Port States ........................................................................................................163
7.3 Bridge ................................................................................................................................ 163
7.4 Bridge Port Roles ............................................................................................................. 165
Chapter 8
WAN Screens.........................................................................................................................167
8.1 WAN Overview ..................................................................................................................167
8.2 Multiple WAN ..................................................................................................................... 167
8.3 Load Balancing Introduction .............................................................................................. 168
8.4 Load Balancing Algorithms ................................................................................................ 168
8.4.1 Least Load First ....................................................................................................... 168
8.4.2 Weighted Round Robin ............................................................................................ 169
8.4.3 Spillover ....................................................................................................................170
8.5 WAN Interface to Local Host Mapping Timeout .................................................................171
8.6 TCP/IP Priority (Metric) ......................................................................................................172
8.7 WAN General ..................................................................................................................... 172
8.8 Configuring Load Balancing ..............................................................................................176
8.8.1 Least Load First ....................................................................................................... 176
8.8.2 Weighted Round Robin ............................................................................................ 177
8.8.3 Spillover ....................................................................................................................178
8.9 WAN IP Address Assignment ............................................................................................ 179
8.10 DNS Server Address Assignment ................................................................................... 179
8.11 WAN MAC Address .........................................................................................................180
8.12 WAN .............................................................................................................................. 180
8.12.1 WAN Ethernet Encapsulation ................................................................................. 180
8.12.2 PPPoE Encapsulation ............................................................................................ 183
8.12.3 PPTP Encapsulation .............................................................................................. 186
8.13 3G (WAN2) ...................................................................................................................... 189
8.14 Traffic Redirect ........................................................................................................... 194
8.15 Configuring Traffic Redirect .............................................................................................195
8.16 Configuring Dial Backup .................................................................................................. 196
8.17 Advanced Modem Setup ............................................................................................... 199
8.17.1 AT Command Strings ............................................................................................. 199
8.17.2 DTR Signal .............................................................................................................200
8.17.3 Response Strings ................................................................................................... 200
8.18 Configuring Advanced Modem Setup .............................................................................. 200
Chapter 9
DMZ Screens.........................................................................................................................203
9.1 DMZ ................................................................................................................................. 203
9.2 Configuring DMZ ............................................................................................................... 203

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9.3 DMZ Static DHCP ............................................................................................................ 206
9.4 DMZ IP Alias .................................................................................................................... 207
9.5 DMZ Public IP Address Example ...................................................................................... 209
9.6 DMZ Private and Public IP Address Example ................................................................... 209
9.7 DMZ Port Roles ............................................................................................................... 210
Chapter 10
WLAN.....................................................................................................................................213
10.1 Wireless LAN Introduction ............................................................................................... 213
10.1.1 Additional Installation Requirements for Using 802.1x ...........................................213
10.2 Configuring WLAN .........................................................................................................213
10.3 WLAN Static DHCP .......................................................................................................216
10.4 WLAN IP Alias ...............................................................................................................217
10.5 WLAN Port Roles ...........................................................................................................219
10.6 Wireless Security ............................................................................................................. 221
10.6.1 Encryption ..............................................................................................................221
10.6.2 Authentication ........................................................................................................222
10.6.3 Restricted Access .................................................................................................. 222
10.6.4 Hide ZyWALL Identity ............................................................................................. 222
10.7 Security Parameters Summary ........................................................................................ 222
10.8 WEP Encryption .............................................................................................................. 223
10.9 802.1x Overview .............................................................................................................. 223
10.9.1 Introduction to RADIUS .......................................................................................... 223
10.9.2 EAP Authentication Overview ................................................................................224
10.10 Dynamic WEP Key Exchange ....................................................................................... 225
10.11 Introduction to WPA .......................................................................................................225
10.11.1 User Authentication .............................................................................................. 225
10.11.2 Encryption ............................................................................................................225
10.12 WPA-PSK Application Example ..................................................................................... 226
10.13 Introduction to RADIUS ................................................................................................. 227
10.14 WPA with RADIUS Application Example ....................................................................... 227
10.15 Wireless Client WPA Supplicants .................................................................................. 228
10.16 Wireless Card .............................................................................................................. 228
10.16.1 Static WEP ...........................................................................................................230
10.16.2 WPA-PSK ............................................................................................................. 231
10.16.3 WPA ..................................................................................................................... 233
10.16.4 IEEE 802.1x + Dynamic WEP .............................................................................. 234
10.16.5 IEEE 802.1x + Static WEP ................................................................................... 235
10.16.6 IEEE 802.1x + No WEP .......................................................................................236
10.16.7 No Access 802.1x + Static WEP ..........................................................................237
10.16.8 No Access 802.1x + No WEP ..............................................................................238
10.17 MAC Filter ..................................................................................................................... 239

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Part III: Security.................................................................................... 241
Chapter 11
Firewall...................................................................................................................................243
11.1 Firewall Overview ............................................................................................................243
11.2 Packet Direction Matrix .................................................................................................... 244
11.3 Packet Direction Examples .............................................................................................. 246
11.3.1 To VPN Packet Direction ........................................................................................ 247
11.3.2 From VPN Packet Direction ...................................................................................248
11.3.3 From VPN To VPN Packet Direction ...................................................................... 250
11.4 Security Considerations ...................................................................................................252
11.5 Firewall Rules Example ...................................................................................................253
11.6 Asymmetrical Routes .......................................................................................................254
11.6.1 Asymmetrical Routes and IP Alias ......................................................................... 255
11.7 Firewall Default Rule (Router Mode) ................................................................................ 255
11.8 Firewall Default Rule (Bridge Mode) .............................................................................. 258
11.9 Firewall Rule Summary ...................................................................................................259
11.9.1 Firewall Edit Rule .............................................................................................. 261
11.10 Anti-Probing ............................................................................................................... 264
11.11 Firewall Thresholds ..................................................................................................... 265
11.11.1 Threshold Values .................................................................................................. 266
11.12 Threshold Screen ........................................................................................................... 266
11.13 Service .......................................................................................................................... 268
11.13.1 Firewall Edit Custom Service .............................................................................. 269
11.14 My Service Firewall Rule Example ................................................................................270
Chapter 12
Intrusion Detection and Prevention (IDP)...........................................................................275
12.1 Introduction to IDP ......................................................................................................275
12.1.1 Firewalls and Intrusions ......................................................................................... 275
12.1.2 IDS and IDP .......................................................................................................... 276
12.1.3 Host IDP ................................................................................................................276
12.1.4 Network IDP .......................................................................................................... 276
12.1.5 Example Intrusions ................................................................................................. 276
12.1.6 ZyWALL IDP .......................................................................................................... 278
Chapter 13
Configuring IDP.....................................................................................................................279
13.1 Overview .......................................................................................................................... 279
13.1.1 Interfaces ...............................................................................................................279
13.2 General Setup ................................................................................................................. 280
13.3 IDP Signatures ................................................................................................................ 282
13.3.1 Attack Types ...........................................................................................................282

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13.3.2 Intrusion Severity ................................................................................................... 283
13.3.3 Signature Actions ................................................................................................... 283
13.3.4 Configuring IDP Signatures .................................................................................... 284
13.3.5 Query View ............................................................................................................286
13.4 Update ............................................................................................................................ 290
13.4.1 mySecurityZone ..................................................................................................... 290
13.4.2 Configuring IDP Update ......................................................................................... 291
13.5 Backup and Restore ........................................................................................................293
Chapter 14
Anti-Virus...............................................................................................................................295
14.1 Anti-Virus Overview ........................................................................................................ 295
14.1.1 Types of Computer Viruses ................................................................................... 295
14.1.2 Computer Virus Infection and Prevention .............................................................. 295
14.1.3 Types of Anti-Virus Scanner .................................................................................. 296
14.2 Introduction to the ZyWALL Anti-Virus Scanner .............................................................. 296
14.2.1 How the ZyWALL Anti-Virus Scanner Works ........................................................ 296
14.2.2 Notes About the ZyWALL Anti-Virus ...................................................................... 297
14.3 General Anti-Virus Setup .................................................................................................298
14.4 Signature Searching ........................................................................................................300
14.4.1 Signature Search Example .................................................................................... 302
14.5 Signature Update ........................................................................................................... 303
14.5.1 mySecurityZone ..................................................................................................... 304
14.5.2 Configuring Anti-virus Update ............................................................................... 304
14.6 Backup and Restore .......................................................................................................306
Chapter 15
Anti-Spam..............................................................................................................................307
15.1 Anti-Spam Overview .....................................................................................................307
15.1.1 Anti-Spam External Database ................................................................................ 307
15.1.2 Spam Threshold ..................................................................................................... 309
15.1.3 Phishing .................................................................................................................309
15.1.4 Whitelist ..................................................................................................................310
15.1.5 Blacklist .................................................................................................................. 310
15.1.6 SMTP and POP3 .................................................................................................... 310
15.1.7 MIME Headers ....................................................................................................... 310
15.2 Anti-Spam General Screen ...............................................................................................311
15.3 Anti-Spam External DB Screen .................................................................................. 313
15.4 Anti-Spam Lists Screen ..................................................................................................315
15.5 Anti-Spam Lists Edit Screen .......................................................................................... 317
Chapter 16
Content Filtering Screens....................................................................................................321

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16.1 Content Filtering Overview ..............................................................................................321
16.1.1 Restrict Web Features ........................................................................................... 321
16.1.2 Create a Filter List .................................................................................................. 321
16.1.3 Customize Web Site Access ................................................................................. 321
16.2 Content Filtering with an External Database ................................................................... 321
16.3 Content Filter General Screen ........................................................................................ 322
16.4 Content Filter Policy .....................................................................................................325
16.5 Content Filter Policy: General .........................................................................................327
16.6 Content Filter Policy: External Database ........................................................................ 329
16.7 Content Filter Policy: Customization ...............................................................................336
16.8 Content Filter Policy: Schedule ...................................................................................... 337
16.9 Content Filter Object ....................................................................................................... 338
16.10 Content Filtering Cache ................................................................................................340
Chapter 17
Content Filtering Reports.....................................................................................................343
17.1 Checking Content Filtering Activation .............................................................................. 343
17.2 Viewing Content Filtering Reports ................................................................................... 343
17.3 Web Site Submission .......................................................................................................348
Chapter 18
IPSec VPN..............................................................................................................................351
18.1 IPSec VPN Overview .....................................................................................................351
18.1.1 IKE SA Overview .................................................................................................... 352
18.2 VPN Rules (IKE) .............................................................................................................. 353
18.3 IKE SA Setup ..................................................................................................................355
18.3.1 IKE SA Proposal .................................................................................................... 355
18.4 Additional IPSec VPN Topics ........................................................................................... 360
18.4.1 SA Life Time ........................................................................................................... 360
18.4.2 IPSec High Availability ...........................................................................................361
18.4.3 Encryption and Authentication Algorithms ............................................................. 361
18.5 VPN Rules (IKE) Gateway Policy Edit ............................................................................. 362
18.6 IPSec SA Overview .....................................................................................................368
18.6.1 Local and Remote Networks .................................................................................. 368
18.6.2 Virtual Address Mapping ........................................................................................ 369
18.6.3 Active Protocol ....................................................................................................... 370
18.6.4 Encapsulation ......................................................................................................... 370
18.6.5 IPSec SA Proposal and Perfect Forward Secrecy ................................................. 371
18.7 Network Policy Edit ......................................................................................................... 372
18.8 Network Policy Edit: Port Forwarding ............................................................................. 377
18.9 Network Policy Move .....................................................................................................379
18.10 IPSec SA Using Manual Keys ................................................................................... 380
18.10.1 IPSec SA Proposal Using Manual Keys ............................................................... 380

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18.10.2 Authentication and the Security Parameter Index (SPI) .......................................380
18.11 VPN Rules (Manual) ...................................................................................................... 380
18.12 VPN Rules (Manual): Edit ........................................................................................... 382
18.13 VPN SA Monitor ...........................................................................................................385
18.14 VPN Global Setting .......................................................................................................385
18.14.1 Local and Remote IP Address Conflict Resolution .............................................. 385
18.15 Telecommuter VPN/IPSec Examples ............................................................................ 388
18.15.1 Telecommuters Sharing One VPN Rule Example ................................................ 389
18.15.2 Telecommuters Using Unique VPN Rules Example .............................................389
18.16 VPN and Remote Management ..................................................................................... 391
18.17 Hub-and-spoke VPN ......................................................................................................391
18.17.1 Hub-and-spoke VPN Example ............................................................................. 392
18.17.2 Hub-and-spoke Example VPN Rule Addresses ................................................... 393
18.17.3 Hub-and-spoke VPN Requirements and Suggestions ......................................... 393
Chapter 19
Certificates ............................................................................................................................395
19.1 Certificates Overview .......................................................................................................395
19.1.1 Advantages of Certificates ..................................................................................... 396
19.2 Self-signed Certificates ....................................................................................................396
19.3 Verifying a Certificate .......................................................................................................396
19.3.1 Checking the Fingerprint of a Certificate on Your Computer ..................................396
19.4 Configuration Summary ...................................................................................................397
19.5 My Certificates ................................................................................................................ 398
19.6 My Certificate Details ..................................................................................................... 400
19.7 My Certificate Export ...................................................................................................... 402
19.7.1 Certificate File Export Formats ............................................................................... 402
19.8 My Certificate Import .....................................................................................................403
19.8.1 Certificate File Formats ..........................................................................................403
19.9 My Certificate Create .....................................................................................................405
19.10 Trusted CAs ................................................................................................................. 410
19.11 Trusted CA Details ........................................................................................................412
19.12 Trusted CA Import .......................................................................................................415
19.13 Trusted Remote Hosts ................................................................................................. 416
19.14 Trusted Remote Hosts Import ...................................................................................... 418
19.15 Trusted Remote Host Certificate Details .....................................................................419
19.16 Directory Servers .......................................................................................................... 421
19.17 Directory Server Add or Edit ........................................................................................ 422
Chapter 20
Authentication Server...........................................................................................................425
20.1 Authentication Server Overview ...................................................................................... 425
20.1.1 Local User Database .............................................................................................. 425

Table of Contents
ZyWALL 5/35/70 Series User’s Guide
20
20.1.2 RADIUS ..................................................................................................................425
20.2 Local User Database .....................................................................................................425
20.3 RADIUS ......................................................................................................................... 427
Part IV: Advanced ................................................................................ 429
Chapter 21
Network Address Translation (NAT)....................................................................................431
21.1 NAT Overview ................................................................................................................431
21.1.1 NAT Definitions ...................................................................................................... 431
21.1.2 What NAT Does .....................................................................................................432
21.1.3 How NAT Works ..................................................................................................... 432
21.1.4 NAT Application ...................................................................................................... 433
21.1.5 Port Restricted Cone NAT ......................................................................................434
21.1.6 NAT Mapping Types ...............................................................................................434
21.2 Using NAT ........................................................................................................................ 435
21.2.1 SUA (Single User Account) Versus NAT ................................................................ 435
21.3 NAT Overview Screen ..................................................................................................... 436
21.4 NAT Address Mapping ................................................................................................... 437
21.4.1 NAT Address Mapping Edit .................................................................................. 439
21.5 Port Forwarding ..............................................................................................................440
21.5.1 Default Server IP Address ......................................................................................441
21.5.2 Port Forwarding: Services and Port Numbers ........................................................ 441
21.5.3 Configuring Servers Behind Port Forwarding (Example) ....................................... 441
21.5.4 NAT and Multiple WAN ...........................................................................................442
21.5.5 Port Translation ...................................................................................................... 442
21.6 Port Forwarding Screen ................................................................................................... 443
21.7 Port Triggering ...............................................................................................................445
Chapter 22
Static Route...........................................................................................................................449
22.1 IP Static Route .............................................................................................................. 449
22.2 IP Static Route ................................................................................................................. 450
22.2.1 IP Static Route Edit ..............................................................................................451
Chapter 23
Policy Route..........................................................................................................................453
23.1 Policy Route ................................................................................................................... 453
23.2 Benefits ............................................................................................................................453
23.3 Routing Policy .................................................................................................................. 453
23.4 IP Routing Policy Setup ...................................................................................................454