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P-2608HWL-Dx Series User’s Guide
192 Chapter 15 Firewalls
Figure 103 Smurf Attack
15.4.2.1 ICMP Vulnerability
ICMP is an error-reporting protocol that works in concert with IP. The following ICMP types
trigger an alert:
15.4.2.2 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 69 ICMP Commands That Trigger Alerts
5 REDIRECT
13 TIMESTAMP_REQUEST
14 TIMESTAMP_REPLY
17 ADDRESS_MASK_REQUEST
18 ADDRESS_MASK_REPLY
Table 70 Legal NetBIOS Commands
MESSAGE:
REQUEST:
POSITIVE:
VE:
RETARGET:
KEEPALIVE:
Table 71 Legal SMTP Commands
AUTH DATA EHLO ETRN EXPN HELO HELP MAIL NOOP
QUIT RCPT RSET SAML SEND SOML TURN VRFY
- P-2608HWL-Dx Series 1
- Copyright 3
- Certifications 4
- Notices 5
- Viewing Certifications 5
- Safety Warnings 6
- Safety Warnings 7 7
- ZyXEL Limited Warranty 8
- Customer Support 9
- 10 Customer Support 10
- Table of Contents 11
- Chapter 8 13
- Chapter 9 13
- Chapter 10 14
- Chapter 11 14
- Chapter 12 15
- Chapter 19 18
- Appendix H 23
- 24 Table of Contents 24
- List of Figures 25
- List of Figures 31 31
- 32 List of Figures 32
- List of Tables 33
- 38 List of Tables 38
- About This User's Guide 39
- Related Documentation 39
- User Guide Feedback 39
- Syntax Conventions 39
- Graphics Icons Key 40
- CHAPTER 1 41
- 1.2 LEDs (Lights) 42
- Table 2 LEDs 43
- CHAPTER 2 45
- Figure 4 Password Screen 46
- 2.1.2 The RESET Button 48
- 2.2.1 Title Bar 49
- 2.2.2 Navigation Panel 49
- 2.2.3 Status Bar 52
- CHAPTER 3 53
- Figure 10 Wizard Welcome 54
- 3.2.1 Manual Configuration 55
- Figure 23 Wireless LAN 62
- CHAPTER 4 67
- Figure 29 Select a Mode 68
- Figure 30 Wizard: Welcome 68
- Figure 33 VoIP Wizard Fail 71
- CHAPTER 5 73
- Figure 35 Select a Mode 74
- Figure 36 Wizard: Welcome 75
- CHAPTER 6 79
- 80 Chapter 6 Status Screens 80
- Table 19 Status Screen 80
- Chapter 6 Status Screens 81 81
- 6.2 Any IP Table 82
- 6.3 WLAN Status 83
- 6.4 Packet Statistics 83
- 84 Chapter 6 Status Screens 84
- Figure 43 Packet Statistics 84
- Table 22 Packet Statistics 84
- 6.5 VoIP Statistics 85
- 86 Chapter 6 Status Screens 86
- Table 23 VoIP Statistics 86
- Chapter 6 Status Screens 87 87
- 88 Chapter 6 Status Screens 88
- CHAPTER 7 89
- 7.1.2 Multiplexing 90
- 7.1.3 VPI and VCI 90
- 7.1.4 IP Address Assignment 91
- 7.1.6 NAT 91
- 7.2 Metric 92
- 7.3 Traffic Shaping 92
- 7.3.1 ATM Traffic Classes 93
- 7.5 Internet Access Setup 94
- Chapter 7 WAN Setup 95 95
- 96 Chapter 7 WAN Setup 96
- Chapter 7 WAN Setup 97 97
- 7.6 WAN More Connections 98
- Chapter 7 WAN Setup 99 99
- 100 Chapter 7 WAN Setup 100
- Chapter 7 WAN Setup 101 101
- 7.7 Traffic Redirect 102
- 7.8 WAN Backup Setup 103
- Check WAN IP Address 104
- CHAPTER 8 105
- 8.1.3 DNS Server Address 106
- 8.1.2 DHCP Setup 106
- 8.2 LAN TCP/IP 107
- 8.2.2 RIP Setup 108
- 8.2.3 Multicast 109
- 8.2.4 Any IP 109
- 8.2.4.1 How Any IP Works 110
- 8.3 Configuring LAN IP 111
- 112 Chapter 8 LAN Setup 112
- Table 30 Advanced LAN Setup 112
- 8.4 DHCP Setup 113
- 8.5 LAN Client List 114
- 8.6 LAN IP Alias 115
- 116 Chapter 8 LAN Setup 116
- Figure 59 LAN IP Alias 116
- Table 33 LAN IP Alias 116
- Chapter 8 LAN Setup 117 117
- 118 Chapter 8 LAN Setup 118
- CHAPTER 9 119
- 9.2.1 SSID 120
- 9.2.2 MAC Address Filter 120
- 9.2.3 User Authentication 120
- 9.2.4 Encryption 121
- 122 Chapter 9 Wireless LAN 122
- Chapter 9 Wireless LAN 123 123
- 9.5.1 No Security 124
- 9.5.2 WEP Encryption Screen 125
- 9.5.3 WPA(2)-PSK 126
- Chapter 9 Wireless LAN 127 127
- 128 Chapter 9 Wireless LAN 128
- Figure 65 Wireless: WPA(2) 128
- Table 39 Wireless: WPA(2) 128
- Chapter 9 Wireless LAN 129 129
- 9.6 OTIST Screen 130
- Chapter 9 Wireless LAN 131 131
- 132 Chapter 9 Wireless LAN 132
- Figure 69 OTIST: Settings 132
- 9.6.1 Notes on OTIST 133
- 9.7 MAC Filter 134
- 9.8 QoS Screen 135
- 136 Chapter 9 Wireless LAN 136
- Table 43 Wireless LAN: QoS 136
- Chapter 9 Wireless LAN 137 137
- 138 Chapter 9 Wireless LAN 138
- CHAPTER 10 139
- 10.1.2 What NAT Does 140
- 10.1.3 How NAT Works 140
- 10.1.4 NAT Application 141
- 10.1.5 NAT Mapping Types 141
- 10.3 NAT General Setup 142
- 10.4 Port Forwarding 143
- Figure 79 Port Forwarding 145
- Table 48 Port Forwarding 145
- 10.6 Address Mapping 147
- 10.6.2 SIP ALG 149
- CHAPTER 11 151
- 11.1.4 SIP Call Progression 152
- 11.1.5 SIP Client Server 152
- 11.1.5.1 SIP User Agent 153
- 11.1.5.2 SIP Proxy Server 153
- 11.1.6 RTP 154
- 11.1.7 NAT and SIP 155
- 11.1.8 Voice Coding 156
- 11.1.11 Custom Tones (IVR) 157
- 11.1.12.2 DiffServ 158
- 11.2 SIP Screens 159
- 160 Chapter 11 SIP 160
- Chapter 11 SIP 161 161
- 162 Chapter 11 SIP 162
- Chapter 11 SIP 163 163
- 164 Chapter 11 SIP 164
- 11.2.3 SIP QoS Screen 165
- 166 Chapter 11 SIP 166
- CHAPTER 12 167
- 12.1.3.1 The Flash Key 168
- Chapter 12 Phone 169 169
- 170 Chapter 12 Phone 170
- 12.2 Phone Screens 171
- 172 Chapter 12 Phone 172
- Chapter 12 Phone 173 173
- 12.2.4 Phone Region Screen 174
- Chapter 12 Phone 175 175
- 176 Chapter 12 Phone 176
- CHAPTER 13 177
- 178 Chapter 13 Phone Book 178
- Chapter 13 Phone Book 179 179
- 180 Chapter 13 Phone Book 180
- 13.4 Group Ring Screen 181
- 182 Chapter 13 Phone Book 182
- Chapter 13 Phone Book 183 183
- 184 Chapter 13 Phone Book 184
- CHAPTER 14 185
- 186 Chapter 14 PSTN Line 186
- CHAPTER 15 187
- 188 Chapter 15 Firewalls 188
- 15.4 Denial of Service 189
- 15.4.2 Types of DoS Attacks 190
- Chapter 15 Firewalls 191 191
- Figure 102 SYN Flood 191
- 15.4.2.1 ICMP Vulnerability 192
- 15.5 Stateful Inspection 193
- 194 Chapter 15 Firewalls 194
- 15.5.3 TCP Security 195
- 15.5.4 UDP/ICMP Security 195
- 15.5.5 Upper Layer Protocols 196
- 15.6.1 Security In General 196
- 15.7.1 Packet Filtering: 197
- 15.7.2 Firewall 198
- CHAPTER 16 199
- 16.3 Rule Logic Overview 200
- 16.4 Connection Direction 201
- 16.4.1 LAN to WAN Rules 202
- 16.4.2 Alerts 202
- 16.6 Firewall Rules Summary 203
- Figure 106 Firewall Rules 204
- Table 73 Firewall Rules 204
- Address 207
- 16.7 Example Firewall Rule 209
- 10.0.0.15 on the LAN 212
- 16.8 DoS Thresholds 213
- 16.8.2 Half-Open Sessions 214
- CHAPTER 17 217
- CHAPTER 18 221
- 18.1.1 IKE SA Overview 222
- 18.1.1.2 IKE SA Proposal 223
- 18.1.1.4 Authentication 224
- Chapter 18 IPSec VPN 225 225
- 18.1.2.1 Negotiation Mode 226
- 18.1.3 IPSec SA Overview 227
- 18.1.3.2 Active Protocol 228
- 18.1.3.3 Encapsulation 228
- Chapter 18 IPSec VPN 229 229
- 18.2 VPN Setup Screen 230
- Chapter 18 IPSec VPN 231 231
- Figure 126 VPN Setup 231
- Table 83 VPN Setup 231
- 18.3 Editing VPN Policies 232
- Chapter 18 IPSec VPN 233 233
- Table 84 Edit VPN Policies 233
- 234 Chapter 18 IPSec VPN 234
- Chapter 18 IPSec VPN 235 235
- 236 Chapter 18 IPSec VPN 236
- Chapter 18 IPSec VPN 237 237
- 238 Chapter 18 IPSec VPN 238
- Chapter 18 IPSec VPN 239 239
- 18.5 Configuring Manual Key 240
- Chapter 18 IPSec VPN 241 241
- Figure 129 VPN: Manual Key 241
- Table 86 VPN: Manual Key 241
- 242 Chapter 18 IPSec VPN 242
- 18.6 Viewing SA Monitor 243
- 244 Chapter 18 IPSec VPN 244
- Figure 130 VPN: SA Monitor 244
- Table 87 VPN: SA Monitor 244
- Chapter 18 IPSec VPN 245 245
- 246 Chapter 18 IPSec VPN 246
- Chapter 18 IPSec VPN 247 247
- 248 Chapter 18 IPSec VPN 248
- CHAPTER 19 249
- 19.3 Configuration Summary 250
- 19.4 My Certificates 251
- 252 Chapter 19 Certificates 252
- 19.5 My Certificate Import 253
- 19.6 My Certificate Create 254
- Chapter 19 Certificates 255 255
- 19.7 My Certificate Details 256
- Chapter 19 Certificates 257 257
- 258 Chapter 19 Certificates 258
- 19.8 Trusted CAs 259
- 260 Chapter 19 Certificates 260
- Figure 139 Trusted CAs 260
- Table 95 Trusted CAs 260
- 19.9 Trusted CA Import 261
- 19.10 Trusted CA Details 262
- Chapter 19 Certificates 263 263
- Table 97 Trusted CA Details 263
- 264 Chapter 19 Certificates 264
- Chapter 19 Certificates 265 265
- 266 Chapter 19 Certificates 266
- Chapter 19 Certificates 267 267
- 268 Chapter 19 Certificates 268
- Chapter 19 Certificates 269 269
- 19.15 Directory Servers 270
- Chapter 19 Certificates 271 271
- Table 101 Directory Servers 271
- 272 Chapter 19 Certificates 272
- CHAPTER 20 273
- 20.2.1 Static Route Edit 274
- Chapter 20 Static Route 275 275
- Table 104 Static Route Edit 275
- 276 Chapter 20 Static Route 276
- CHAPTER 21 277
- 21.5 Scheduler 278
- 21.8 Configuring Summary 282
- 21.9.1 Rule Configuration 285
- 21.10 Bandwidth Monitor 287
- CHAPTER 22 289
- Figure 157 Dynamic DNS 290
- Table 114 Dynamic DNS 290
- Device and the DDNS server 291
- CHAPTER 23 293
- 23.2 Introduction to HTTPS 294
- 23.3 WWW 295
- 23.4 Telnet 296
- 23.5 Configuring Telnet 297
- 23.6 Configuring FTP 298
- 23.7 SNMP 299
- 23.7.1 Supported MIBs 300
- 23.7.2 SNMP Traps 300
- 23.7.3 Configuring SNMP 300
- 23.8 Configuring DNS 302
- 23.9 Configuring ICMP 302
- 23.10 TR-069 304
- Table 122 TR-069 Commands 305
- CHAPTER 24 307
- 24.2 UPnP and ZyXEL 308
- Table 123 Configuring UPnP 309
- Components selection box 310
- Figure 178 System Tray Icon 315
- Network 316
- CHAPTER 25 319
- 320 Chapter 25 System 320
- 25.2 Time Setting 321
- 322 Chapter 25 System 322
- Chapter 25 System 323 323
- 324 Chapter 25 System 324
- CHAPTER 26 325
- 326 Chapter 26 Logs 326
- Figure 185 View Log 326
- Table 126 View Log 326
- Chapter 26 Logs 327 327
- Figure 186 Log Settings 327
- Table 127 Log Settings 327
- 328 Chapter 26 Logs 328
- 26.4 SMTP Error Messages 329
- 330 Chapter 26 Logs 330
- CHAPTER 27 331
- 332 Chapter 27 Tools 332
- Chapter 27 Tools 333 333
- Figure 188 Firmware Upgrade 333
- Table 130 Firmware Upgrade 333
- 27.5 Backup and Restore 334
- 27.5.1 Backup Configuration 335
- 336 Chapter 27 Tools 336
- 27.6 Restart 337
- 340 Chapter 27 Tools 340
- Chapter 27 Tools 341 341
- 27.9.3 TFTP File Upload 342
- Chapter 27 Tools 343 343
- 344 Chapter 27 Tools 344
- CHAPTER 28 345
- 346 Chapter 28 Diagnostic 346
- 348 Chapter 28 Diagnostic 348
- CHAPTER 29 349
- 29.3 Problems with the WAN 350
- Figure 203 Pop-up Blocker 352
- Figure 205 Internet Options 354
- 29.4.1.2 JavaScripts 355
- 3 Scroll down to Scripting 356
- 29.4.1.3 Java Permissions 357
- 29.4.1.3.1 JAVA (Sun) 358
- 29.5 Telephone Problems 359
- APPENDIX A 361
- Table 142 Firmware Features 362
- APPENDIX B 367
- Installing Components 368
- Configuring 369
- Windows 2000/NT/XP 370
- Macintosh OS 8/9 374
- Macintosh OS X 376
- Verifying Settings 377
- APPENDIX C 379
- Subnet Masks 381
- Subnetting 381
- Example: Two Subnets 382
- Example: Four Subnets 383
- Example Eight Subnets 384
- Table 156 Eight Subnets 385
- Appendix D 387
- Common Services 387
- APPENDIX E 389
- Figure 225 Login Screen 390
- APPENDIX F 399
- IP Aliasing 400
- Gateways on the WAN Side 401
- 402 Appendix F Triangle Route 402
- APPENDIX G 403
- Table 161 System Error Logs 404
- Table 163 TCP Reset Logs 405
- Table 165 ICMP Logs 405
- Table 166 CDR Logs 406
- Table 167 PPP Logs 406
- Table 168 UPnP Logs 407
- Table 170 Attack Logs 407
- Table 171 802.1X Logs 408
- Table 172 ACL Setting Notes 409
- Table 173 ICMP Notes 409
- Table 174 Syslog Logs 410
- Table 175 SIP Logs 410
- Log Commands 412
- Displaying Logs 413
- Log Command Example 414
- APPENDIX H 415
- Table 183 Menu 3 418
- Table 185 Menu 12 423
- Command Examples 438
- Index 441 441
- 442 Index 442
- Index 443 443
- 444 Index 444
- Index 445 445
- 446 Index 446
- Index 447 447
- 448 Index 448
- Index 449 449
- 450 Index 450
- WPA-PSK 126 450
- Index 451 451
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