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P-2602H(W)(L)-DxA Series User’s Guide
186 Chapter 13 Firewalls
Figure 101 Smurf Attack
13.4.2.1 ICMP Vulnerability
ICMP is an error-reporting protocol that works in concert with IP. The following ICMP types
trigger an alert:
13.4.2.2 Illegal Commands (NetBIOS and SMTP)
The only legal NetBIOS commands are the following - all others are illegal.
All SMTP commands are illegal except for those displayed in the following tables.
Table 67 ICMP Commands That Trigger Alerts
5 REDIRECT
13 TIMESTAMP_REQUEST
14 TIMESTAMP_REPLY
17 ADDRESS_MASK_REQUEST
18 ADDRESS_MASK_REPLY
Table 68 Legal NetBIOS Commands
MESSAGE:
REQUEST:
POSITIVE:
VE:
RETARGET:
KEEPALIVE:
Table 69 Legal SMTP Commands
AUTH DATA EHLO ETRN EXPN HELO HELP MAIL NOOP
QUIT RCPT RSET SAML SEND SOML TURN VRFY
- P-2602HW(L) Series 1
- P-2602H Series 1
- Copyright 3
- Certifications 4
- Safety Warnings 5
- ZyXEL Limited Warranty 6
- Customer Support 7
- 8 Customer Support 8
- Table of Contents 9
- Chapter 8 11
- Chapter 9 11
- Chapter 10 12
- Chapter 11 12
- Chapter 12 14
- Chapter 13 14
- Chapter 17 16
- List of Figures 23
- List of Tables 29
- 34 List of Tables 34
- About This User's Guide 35
- Related Documentation 35
- User Guide Feedback 35
- Syntax Conventions 35
- Graphics Icons Key 36
- CHAPTER 1 37
- 1.2 Features 38
- Table 3 IEEE 802.11g 42
- 1.4.1 Internet Access 44
- 1.4.5 LAN to LAN Application 46
- 1.4.6 LEDs 47
- Table 4 LEDs (continued) 48
- CHAPTER 2 49
- Figure 7 Password Screen 50
- 2.1.2 The RESET Button 51
- 2.2.1 Title Bar 52
- 2.2.2 Navigation Panel 53
- 2.2.3 Main Window 55
- 2.2.4 Status Bar 55
- CHAPTER 3 57
- Figure 12 Wizard Welcome 58
- 3.2.1 Manual Configuration 59
- LABEL DESCRIPTION 64
- Figure 25 Wireless LAN 66
- CHAPTER 4 71
- Figure 31 Select a Mode 72
- Figure 32 Wizard: Welcome 72
- Figure 35 VoIP Wizard Fail 75
- CHAPTER 5 77
- Figure 37 Select a Mode 79
- Figure 38 Wizard: Welcome 79
- CHAPTER 6 83
- 84 Chapter 6 Status Screens 84
- Table 21 Status Screen 84
- Chapter 6 Status Screens 85 85
- 6.2 Any IP Table 86
- 6.4 Packet Statistics 87
- 88 Chapter 6 Status Screens 88
- Figure 45 Packet Statistics 88
- Table 24 Packet Statistics 88
- 6.5 VoIP Statistics 89
- 90 Chapter 6 Status Screens 90
- Table 25 VoIP Statistics 90
- Chapter 6 Status Screens 91 91
- 92 Chapter 6 Status Screens 92
- CHAPTER 7 93
- 7.1.2 Multiplexing 94
- 7.1.3 VPI and VCI 94
- 7.1.4 IP Address Assignment 95
- 7.1.6 NAT 95
- 7.2 Metric 96
- 7.3 Traffic Shaping 96
- 7.3.1 ATM Traffic Classes 97
- 7.5 Internet Access Setup 98
- Chapter 7 WAN Setup 99 99
- 100 Chapter 7 WAN Setup 100
- Chapter 7 WAN Setup 101 101
- 7.6 WAN More Connections 102
- 7.7 Traffic Redirect 103
- 104 Chapter 7 WAN Setup 104
- 7.8 WAN Backup Setup 105
- Check WAN IP Address 106
- CHAPTER 8 107
- 8.1.2 DHCP Setup 108
- 8.1.3 DNS Server Address 108
- 8.2 LAN TCP/IP 109
- 8.2.2 RIP Setup 110
- 8.2.3 Multicast 111
- 8.2.4 Any IP 111
- 8.2.4.1 How Any IP Works 112
- 8.3 Configuring LAN IP 113
- 114 Chapter 8 LAN Setup 114
- Table 31 Advanced LAN Setup 114
- 8.4 DHCP Setup 115
- 8.5 LAN Client List 116
- 8.6 LAN IP Alias 117
- 118 Chapter 8 LAN Setup 118
- Figure 60 LAN IP Alias 118
- Table 34 LAN IP Alias 118
- Chapter 8 LAN Setup 119 119
- 120 Chapter 8 LAN Setup 120
- CHAPTER 9 121
- 9.2.1 SSID 122
- 9.2.2 MAC Address Filter 122
- 9.2.3 User Authentication 123
- 9.2.4 Encryption 123
- 124 Chapter 9 Wireless LAN 124
- 9.5 General WLAN Screen 125
- 9.5.1 No Security 126
- 9.5.2 WEP Encryption Screen 127
- 9.5.3 WPA(2)-PSK 128
- Chapter 9 Wireless LAN 129 129
- 130 Chapter 9 Wireless LAN 130
- Figure 66 Wireless: WPA(2) 130
- Table 40 Wireless: WPA(2) 130
- Chapter 9 Wireless LAN 131 131
- 132 Chapter 9 Wireless LAN 132
- Figure 67 Advanced 132
- 9.6 OTIST Screen 133
- 134 Chapter 9 Wireless LAN 134
- Figure 70 OTIST: Settings 134
- 9.6.1 Notes on OTIST 135
- 9.7 MAC Filter 136
- 9.8 QoS Screen 137
- 138 Chapter 9 Wireless LAN 138
- Table 44 Wireless LAN: QoS 138
- Chapter 9 Wireless LAN 139 139
- 140 Chapter 9 Wireless LAN 140
- CHAPTER 10 141
- 10.1.2 What NAT Does 142
- 10.1.3 How NAT Works 142
- 10.1.4 NAT Application 143
- 10.1.5 NAT Mapping Types 143
- 10.3 NAT General Setup 144
- 10.4 Port Forwarding 145
- Figure 81 Port Forwarding 147
- Table 49 Port Forwarding 147
- 10.5.2 SIP ALG 149
- CHAPTER 11 151
- 11.2.2 SIP Call Progression 152
- 11.2.3 SIP Servers 152
- 11.2.3.1 SIP User Agent 153
- 11.2.3.2 SIP Proxy Server 153
- 11.3 SIP Settings Screen 154
- Chapter 11 Voice 155 155
- 11.4 Pulse Code Modulation 156
- 11.5 Voice Coding 156
- 11.8 Custom Tones (IVR) 157
- 158 Chapter 11 Voice 158
- Chapter 11 Voice 159 159
- 160 Chapter 11 Voice 160
- Chapter 11 Voice 161 161
- 11.10.2 DiffServ 162
- 11.10.3 VLAN 163
- 11.10.4 SIP QoS Screen 163
- 11.11 Phone 164
- 11.13 Analog Phone Screen 165
- 166 Chapter 11 Voice 166
- > Phone > Common 167
- 11.15.1 The Flash Key 168
- 11.15.2.1 European Call Hold 169
- 11.15.3.1 USA Call Hold 170
- 11.16 Phone Region Screen 171
- 11.17 Speed Dial 172
- 11.18 Speed Dial Screen 173
- 174 Chapter 11 Voice 174
- Chapter 11 Voice 175 175
- 176 Chapter 11 Voice 176
- Chapter 11 Voice 177 177
- 178 Chapter 11 Voice 178
- CHAPTER 12 179
- 12.5 Auto Firmware Upgrade 180
- CHAPTER 13 181
- 182 Chapter 13 Firewalls 182
- 13.4 Denial of Service 183
- 13.4.2 Types of DoS Attacks 184
- Chapter 13 Firewalls 185 185
- Figure 100 SYN Flood 185
- 13.4.2.1 ICMP Vulnerability 186
- 13.5 Stateful Inspection 187
- 188 Chapter 13 Firewalls 188
- 13.5.3 TCP Security 189
- 13.5.4 UDP/ICMP Security 189
- 13.5.5 Upper Layer Protocols 190
- 13.6.1 Security In General 190
- 13.7.1 Packet Filtering: 191
- 13.7.2 Firewall 192
- CHAPTER 14 193
- 14.3 Rule Logic Overview 194
- 14.4 Connection Direction 195
- 14.4.1 LAN to WAN Rules 196
- 14.4.2 Alerts 196
- 14.6 Firewall Rules Summary 197
- Figure 104 Firewall Rules 198
- Table 71 Firewall Rules 198
- Address 201
- 14.7 Example Firewall Rule 203
- 10.0.0.15 on the LAN 206
- 14.8 DoS Thresholds 207
- 14.8.2 Half-Open Sessions 208
- CHAPTER 15 211
- CHAPTER 16 215
- 16.2 IPSec Architecture 216
- 16.3 Encapsulation 217
- 16.4 IPSec and NAT 218
- Table 79 VPN and NAT 219
- CHAPTER 17 221
- 17.3 My IP Address 222
- 17.4 Secure Gateway Address 223
- 17.5 VPN Setup Screen 223
- 224 Chapter 17 VPN Screens 224
- Figure 121 VPN Setup 224
- Table 81 VPN Setup 224
- 17.6 Keep Alive 225
- 226 Chapter 17 VPN Screens 226
- Table 82 VPN and NAT 226
- 17.8 Remote DNS Server 227
- 17.9 ID Type and Content 227
- 228 Chapter 17 VPN Screens 228
- 17.10 Pre-Shared Key 229
- 17.11 Editing VPN Policies 229
- 230 Chapter 17 VPN Screens 230
- Table 87 Edit VPN Policies 230
- Chapter 17 VPN Screens 231 231
- 232 Chapter 17 VPN Screens 232
- Chapter 17 VPN Screens 233 233
- 17.12 IKE Phases 234
- 17.12.1 Negotiation Mode 235
- 236 Chapter 17 VPN Screens 236
- Chapter 17 VPN Screens 237 237
- 238 Chapter 17 VPN Screens 238
- 17.14 Manual Key Setup 239
- 240 Chapter 17 VPN Screens 240
- Figure 127 VPN: Manual Key 240
- Table 89 VPN: Manual Key 240
- Chapter 17 VPN Screens 241 241
- 17.16 Viewing SA Monitor 242
- Chapter 17 VPN Screens 243 243
- Figure 128 VPN: SA Monitor 243
- Table 90 VPN: SA Monitor 243
- 244 Chapter 17 VPN Screens 244
- Chapter 17 VPN Screens 245 245
- 246 Chapter 17 VPN Screens 246
- Chapter 17 VPN Screens 247 247
- 248 Chapter 17 VPN Screens 248
- CHAPTER 18 249
- 18.2.1 Static Route Edit 250
- Chapter 18 Static Route 251 251
- Table 95 Static Route Edit 251
- 252 Chapter 18 Static Route 252
- CHAPTER 19 253
- 19.5 Scheduler 254
- 19.7 Configuring Summary 257
- 19.8.1 Rule Configuration 260
- 19.9 Bandwidth Monitor 262
- CHAPTER 20 263
- Figure 140 Dynamic DNS 264
- Table 104 Dynamic DNS 264
- Device and the DDNS server 265
- CHAPTER 21 267
- 21.2 WWW 268
- 21.3 Telnet 269
- 21.4 Configuring Telnet 269
- 21.5 Configuring FTP 270
- 21.6 SNMP 271
- 21.6.1 Supported MIBs 272
- 21.6.2 SNMP Traps 273
- 21.6.3 Configuring SNMP 273
- 21.7 Configuring DNS 275
- 21.8 Configuring ICMP 275
- CHAPTER 22 277
- 22.2 UPnP and ZyXEL 278
- Table 112 Configuring UPnP 279
- Components selection box 280
- Figure 159 System Tray Icon 285
- Network 286
- CHAPTER 23 289
- 290 Chapter 23 System 290
- 23.2 Time Setting 291
- 292 Chapter 23 System 292
- Chapter 23 System 293 293
- 294 Chapter 23 System 294
- CHAPTER 24 295
- 296 Chapter 24 Logs 296
- Figure 166 View Log 296
- Table 115 View Log 296
- Chapter 24 Logs 297 297
- Figure 167 Log Settings 297
- Table 116 Log Settings 297
- 298 Chapter 24 Logs 298
- 24.4 SMTP Error Messages 299
- 300 Chapter 24 Logs 300
- CHAPTER 25 301
- 302 Chapter 25 Tools 302
- Chapter 25 Tools 303 303
- Figure 169 Firmware Upgrade 303
- Table 119 Firmware Upgrade 303
- 25.5 Backup and Restore 304
- 25.5.1 Backup Configuration 305
- 306 Chapter 25 Tools 306
- 25.6 Restart 307
- Chapter 25 Tools 311 311
- 25.9.3 TFTP File Upload 312
- Chapter 25 Tools 313 313
- 314 Chapter 25 Tools 314
- CHAPTER 26 315
- 316 Chapter 26 Diagnostic 316
- 318 Chapter 26 Diagnostic 318
- CHAPTER 27 319
- 27.3 Problems with the WAN 320
- Figure 185 Pop-up Blocker 322
- Figure 187 Internet Options 324
- 27.4.1.2 JavaScripts 325
- 3 Scroll down to Scripting 326
- 27.4.1.3 Java Permissions 327
- 27.4.1.3.1 JAVA (Sun) 328
- 27.5 Telephone Problems 329
- 27.6.1 Outgoing Calls 330
- 27.6.2 Incoming Calls 331
- APPENDIX A 333
- APPENDIX B 339
- ZyXEL Device With ISDN 340
- APPENDIX C 341
- Installing Components 342
- Configuring 343
- Windows 2000/NT/XP 344
- Verifying Settings 348
- Macintosh OS 8/9 349
- Macintosh OS X 350
- APPENDIX D 353
- Subnet Masks 355
- Subnetting 355
- Example: Two Subnets 356
- Example: Four Subnets 357
- Example Eight Subnets 358
- Table 144 Eight Subnets 359
- APPENDIX E 361
- 362 Appendix E Wireless LANs 362
- Appendix E Wireless LANs 363 363
- Fragmentation Threshold 364
- Preamble Type 365
- IEEE 802.1x 366
- Types of Authentication 367
- PEAP (Protected EAP) 368
- Dynamic WEP Key Exchange 368
- User Authentication 369
- Encryption 369
- Security Parameters Summary 370
- APPENDIX F 371
- 372 Appendix F Services 372
- Appendix F Services 373 373
- 374 Appendix F Services 374
- APPENDIX G 375
- APPENDIX H 377
- IP Aliasing 378
- Gateways on the WAN Side 379
- 380 Appendix H Triangle Route 380
- APPENDIX I 381
- Table 153 System Error Logs 382
- Table 155 TCP Reset Logs 383
- Table 157 ICMP Logs 383
- Table 158 CDR Logs 384
- Table 159 PPP Logs 384
- Table 160 UPnP Logs 385
- Table 162 Attack Logs 385
- Table 163 802.1X Logs 386
- Table 164 ACL Setting Notes 387
- Table 165 ICMP Notes 387
- Table 166 Syslog Logs 388
- Table 167 SIP Logs 388
- Log Commands 390
- Displaying Logs 391
- Log Command Example 392
- APPENDIX J 393
- APPENDIX K 395
- Table 175 Menu 3 398
- Table 177 Menu 12 403
- Command Examples 419
- Index 421 421
- 422 Index 422
- Index 423 423
- 424 Index 424
- Index 425 425
- 426 Index 426
- Index 427 427
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