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Chapter 14 Firewalls
P-2602H(W)(L)-DxA User’s Guide
206
• To selectively block/allow inbound or outbound traffic between inside host/networks and
outside host/networks. Remember that filters can not distinguish traffic originating from
an inside host or an outside host by IP address.
• The firewall performs better than filtering if you need to check many rules.
• Use the firewall if you need routine e-mail reports about your system or need to be alerted
when attacks occur.
• The firewall can block specific URL traffic that might occur in the future. The URL can be
saved in an Access Control List (ACL) database.
- P-2602HW(L) Series 1
- P-2602H Series 1
- About This User's Guide 3
- Document Conventions 4
- Icons Used in Figures 5
- Safety Warnings 6
- Safety Warnings 7
- Contents Overview 10
- Table of Contents 11
- Chapter 8 13
- Chapter 9 13
- Chapter 10 14
- Chapter 11 14
- Chapter 12 15
- Chapter 16 17
- Chapter 17 17
- Chapter 18 18
- Chapter 19 18
- Chapter 28 21
- Chapter 29 21
- List of Figures 23
- List of Tables 31
- Introduction 37
- CHAPTER 1 39
- 1.4.1 Internet Access 41
- 1.4.5 LAN to LAN Application 43
- 1.5 LEDs 44
- 1.6 The RESET Button 45
- CHAPTER 2 47
- Figure 7 Password Screen 48
- 2.2.1 Title Bar 50
- 2.2.2 Navigation Panel 51
- 2.2.3 Main Window 53
- 2.2.4 Status Bar 53
- VoIP Wizard And Example (71) 55
- CHAPTER 3 57
- Figure 12 Select a Mode 58
- Figure 13 Wizard Welcome 58
- 3.2.1 Manual Configuration 60
- Figure 26 Wireless LAN 67
- Shared Key 68
- CHAPTER 4 71
- Figure 32 Select a Mode 72
- Figure 33 Wizard: Welcome 72
- Figure 36 VoIP Wizard Fail 74
- CHAPTER 5 77
- Figure 39 Wizard: Welcome 78
- PART III 81
- CHAPTER 6 83
- Chapter 6 Status Screens 84
- Table 17 Status Screen 84
- Chapter 6 Status Screens 85
- 6.2 Any IP Table 86
- 6.4 Packet Statistics 87
- Figure 45 Packet Statistics 88
- Table 20 Packet Statistics 88
- 6.5 VoIP Statistics 89
- Table 21 VoIP Statistics 90
- CHAPTER 7 93
- 7.1.2 Multiplexing 94
- 7.1.3 VPI and VCI 94
- 7.1.4 IP Address Assignment 94
- 7.2 Metric 95
- 7.3 Traffic Shaping 96
- 7.3.1 ATM Traffic Classes 97
- 7.5 Internet Access Setup 98
- Chapter 7 WAN Setup 99
- Chapter 7 WAN Setup 100
- 7.6 WAN More Connections 101
- 7.7 Traffic Redirect 102
- 7.8 WAN Backup Setup 103
- Check WAN IP Address 104
- CHAPTER 8 105
- 8.2 DNS Server Addresses 106
- 8.3 LAN TCP/IP 106
- Chapter 8 LAN Setup 107
- 8.3.2 RIP Setup 108
- 8.3.3 Multicast 108
- 8.3.4 Any IP 109
- 8.4 Configuring LAN IP 110
- Table 26 LAN IP (continued) 111
- Table 27 Advanced LAN Setup 111
- 8.5 DHCP Setup 112
- 8.6 LAN Client List 113
- 8.7 LAN IP Alias 114
- Figure 60 LAN IP Alias 115
- Chapter 8 LAN Setup 116
- Table 30 LAN IP Alias 116
- CHAPTER 9 117
- 9.2.1 SSID 118
- 9.2.2 MAC Address Filter 118
- 9.2.3 User Authentication 118
- 9.2.4 Encryption 119
- Chapter 9 Wireless LAN 120
- 9.5 General WLAN Screen 121
- 9.5.1 No Security 122
- 9.5.2 WEP Encryption Screen 123
- 9.5.3 WPA(2)-PSK 124
- Chapter 9 Wireless LAN 125
- Figure 66 Wireless: WPA(2) 126
- Table 37 Wireless: WPA(2) 126
- Figure 67 Advanced 127
- 9.6 OTIST Screen 128
- 9.6.1 Notes on OTIST 130
- 9.7 MAC Filter 131
- Table 40 MAC Address Filter 132
- 9.8 QoS Screen 133
- Table 41 Wireless LAN: QoS 134
- CHAPTER 10 137
- 10.1.2 What NAT Does 138
- 10.1.3 How NAT Works 138
- 10.1.4 NAT Application 138
- 10.1.5 NAT Mapping Types 139
- 10.3 NAT General Setup 140
- 10.4 Port Forwarding 141
- Figure 81 Port Forwarding 143
- Table 46 Port Forwarding 143
- 10.6 Address Mapping 145
- 10.6.2 SIP ALG 148
- CHAPTER 11 149
- 11.2.2 SIP Call Progression 150
- 11.2.3 SIP Servers 150
- Chapter 11 Voice 151
- Figure 86 SIP User Agent 151
- Figure 87 SIP Proxy Server 151
- 11.2.4 RTP 152
- 11.2.5 Pulse Code Modulation 152
- 11.2.6 Voice Coding 152
- 11.2.9 Custom Tones (IVR) 153
- 11.3.1 Type of Service (ToS) 154
- 11.3.2 DiffServ 154
- 11.4 SIP Settings Screen 155
- Chapter 11 Voice 156
- 11.6 SIP QoS Screen 160
- 11.7 Phone 160
- 11.8 Analog Phone Screen 161
- Figure 95 Phone > Common 164
- Table 58 Phone > Common 164
- 11.11.1 The Flash Key 165
- 11.12 Phone Region Screen 168
- 11.13 Speed Dial 168
- CHAPTER 12 175
- Chapter 12 VoIP Trunking 176
- 12.3 Call Rules 177
- 12.4 VoIP Trunking Scenarios 177
- 12.5 Trunking General Screen 178
- Chapter 12 VoIP Trunking 179
- 12.8.4 Call Progression 185
- 12.9.4 Call Progression 188
- CHAPTER 13 191
- 13.7 Phone Functions Summary 192
- Chapter 13 Phone Usage 193
- Chapter 13 Phone Usage 194
- CHAPTER 14 195
- Chapter 14 Firewalls 196
- 14.4 Denial of Service 197
- 14.4.2 Types of DoS Attacks 198
- Chapter 14 Firewalls 199
- Figure 119 SYN Flood 199
- Figure 120 Smurf Attack 199
- 14.5 Stateful Inspection 200
- 14.5.3 TCP Security 202
- 14.5.4 UDP/ICMP Security 203
- 14.5.5 Upper Layer Protocols 203
- 14.6.1 Security In General 204
- 14.7.1 Packet Filtering: 205
- 14.7.2 Firewall 205
- CHAPTER 15 207
- 15.3 Rule Logic Overview 208
- 15.4 Connection Direction 209
- 15.4.1 LAN to WAN Rules 210
- 15.4.2 Alerts 210
- 15.6 Firewall Rules Summary 211
- Figure 123 Firewall Rules 212
- Table 79 Firewall Rules 212
- Address 215
- 15.7 Example Firewall Rule 217
- 10.0.0.15 on the LAN 220
- 15.8 DoS Thresholds 221
- 15.8.2 Half-Open Sessions 222
- 15.9 Firewall Commands 224
- CHAPTER 16 227
- Chapter 16 Content Filtering 228
- Chapter 16 Content Filtering 229
- CHAPTER 17 231
- 17.2 IPSec Architecture 232
- 17.3 Encapsulation 233
- 17.4 IPSec and NAT 234
- Table 88 VPN and NAT 235
- CHAPTER 18 237
- 18.3 My IP Address 238
- 18.4 Secure Gateway Address 238
- 18.5 VPN Setup Screen 239
- Chapter 18 VPN Screens 240
- Figure 140 VPN Setup 240
- Table 90 VPN Setup 240
- 18.6 Keep Alive 241
- 18.8 Remote DNS Server 242
- 18.9 ID Type and Content 243
- VPN tunnel 244
- 18.10 Pre-Shared Key 245
- 18.11 Editing VPN Policies 245
- Table 96 Edit VPN Policies 246
- Chapter 18 VPN Screens 247
- 18.12 IKE Phases 250
- 18.12.1 Negotiation Mode 251
- 18.14 Manual Key Setup 254
- Figure 146 VPN: Manual Key 255
- Table 98 VPN: Manual Key 255
- 18.16 Viewing SA Monitor 257
- Figure 147 VPN: SA Monitor 258
- Table 99 VPN: SA Monitor 258
- CHAPTER 19 263
- 19.3 Configuration Summary 264
- 19.4 My Certificates 265
- 19.5 My Certificate Import 266
- Chapter 19 Certificates 267
- 19.6 My Certificate Create 268
- 19.7 My Certificate Details 270
- Chapter 19 Certificates 272
- 19.8 Trusted CAs 273
- Figure 156 Trusted CAs 274
- Table 107 Trusted CAs 274
- 19.9 Trusted CA Import 275
- 19.10 Trusted CA Details 276
- 19.15 Directory Servers 284
- Table 113 Directory Servers 285
- CHAPTER 20 287
- 20.2.1 Static Route Edit 288
- Chapter 20 Static Route 289
- Table 116 Static Route Edit 289
- Chapter 20 Static Route 290
- CHAPTER 21 291
- 21.7.1 Rule Configuration 295
- 21.8 Bandwidth Monitor 297
- CHAPTER 22 299
- Chapter 22 Dynamic DNS Setup 300
- Figure 174 Dynamic DNS 300
- Table 124 Dynamic DNS 300
- Device and the DDNS server 301
- CHAPTER 23 303
- 23.2 WWW 304
- 23.3 Telnet 305
- 23.4 Configuring Telnet 306
- 23.5 Configuring FTP 306
- 23.6 SNMP 307
- 23.6.1 Supported MIBs 308
- 23.6.2 SNMP Traps 309
- 23.6.3 Configuring SNMP 309
- 23.7 Configuring DNS 310
- 23.8 Configuring ICMP 311
- CHAPTER 24 313
- 24.2 UPnP and ZyXEL 314
- Table 132 Configuring UPnP 315
- Figure 194 System Tray Icon 321
- Network 322
- Maintenance and 325
- Troubleshooting 325
- CHAPTER 25 327
- Chapter 25 System 328
- 25.2 Time Setting 329
- CHAPTER 26 331
- Chapter 26 Logs 332
- Figure 201 View Log 332
- Table 135 View Log 332
- Chapter 26 Logs 333
- Figure 202 Log Settings 333
- Table 136 Log Settings 333
- 26.4 SMTP Error Messages 334
- 26.4.1 Example E-mail Log 335
- 26.5 Log Descriptions 336
- Table 139 System Error Logs 337
- Table 141 TCP Reset Logs 337
- Table 149 802.1X Logs 340
- Table 150 ACL Setting Notes 341
- Table 151 ICMP Notes 341
- Table 152 Syslog Logs 342
- Table 153 SIP Logs 342
- CHAPTER 27 345
- Chapter 27 Tools 346
- Chapter 27 Tools 347
- Figure 204 Firmware Upgrade 347
- Table 160 Firmware Upgrade 347
- 27.5 Backup and Restore 348
- 27.5.1 Backup Configuration 349
- 27.6 Restart 351
- DAMAGE your device 354
- 27.9.3 TFTP File Upload 355
- CHAPTER 28 357
- Chapter 28 Diagnostic 358
- Chapter 28 Diagnostic 359
- CHAPTER 29 361
- V I forgot the password 362
- FTP to upload new firmware 363
- 29.3 Internet Access 364
- 29.4 Phone Calls and VoIP 365
- 29.5.1 Outgoing Calls 366
- 29.5.2 Incoming Calls 367
- Chapter 29 Troubleshooting 368
- Appendices and 369
- APPENDIX A 371
- Voice Specifications 375
- Table 168 Voice Features 376
- Table 169 Wireless Features 378
- IEEE 802.11g Wireless LAN 379
- Power Adaptor Specifications 380
- APPENDIX B 381
- Installing Components 382
- Configuring 383
- Windows 2000/NT/XP 384
- Macintosh OS 8/9 388
- Macintosh OS X 390
- Verifying Settings 391
- APPENDIX C 393
- JavaScripts 396
- Java Permissions 397
- JAVA (Sun) 398
- APPENDIX D 399
- Subnet Masks 400
- Notation 401
- Subnetting 402
- Example: Four Subnets 403
- Example: Eight Subnets 404
- Subnet Planning 405
- Configuring IP Addresses 406
- APPENDIX E 407
- Appendix E Wireless LANs 408
- Appendix E Wireless LANs 409
- Fragmentation Threshold 410
- Preamble Type 411
- IEEE 802.1x 411
- Types of RADIUS Messages 412
- Types of Authentication 413
- PEAP (Protected EAP) 414
- Dynamic WEP Key Exchange 414
- User Authentication 414
- Security Parameters Summary 415
- APPENDIX F 417
- Appendix F Services 418
- Appendix F Services 419
- APPENDIX G 421
- Displaying Logs 422
- Log Command Example 423
- APPENDIX H 425
- Appendix H Internal SPTGEN 428
- Table 189 Menu 3 428
- Appendix H Internal SPTGEN 429
- Table 191 Menu 12 433
- Command Examples 448
- APPENDIX I 449
- ZyXEL Limited Warranty 451
- Appendix I Legal Information 452
- APPENDIX J 453
- Appendix J Customer Support 454
- Appendix J Customer Support 455
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