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P-2602R/RL-DxA Series User’s Guide
154 Chapter 12 Firewalls
Figure 75 Smurf Attack
12.4.2.1 ICMP Vulnerability
ICMP is an error-reporting protocol that works in concert with IP. The following ICMP types
trigger an alert:
12.4.2.2 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 51 ICMP Commands That Trigger Alerts
5 REDIRECT
13 TIMESTAMP_REQUEST
14 TIMESTAMP_REPLY
17 ADDRESS_MASK_REQUEST
18 ADDRESS_MASK_REPLY
Table 52 Legal NetBIOS Commands
MESSAGE:
REQUEST:
POSITIVE:
VE:
RETARGET:
KEEPALIVE:
Table 53 Legal SMTP Commands
AUTH DATA EHLO ETRN EXPN HELO HELP MAIL NOOP
QUIT RCPT RSET SAML SEND SOML TURN VRFY
- P-2602R/RL-DxA Series 1
- Copyright 3
- Certifications 4
- Certifications 5 5
- Safety Warnings 6
- ZyXEL Limited Warranty 7
- Customer Support 8
- Customer Support 9 9
- 10 Customer Support 10
- Table of Contents 11
- Chapter 8 13
- Chapter 9 13
- Chapter 10 14
- Chapter 11 15
- Chapter 12 15
- Chapter 13 16
- 22 Table of Contents 22
- List of Figures 23
- 28 List of Figures 28
- List of Tables 29
- About This User's Guide 33
- Related Documentation 33
- User Guide Feedback 33
- Syntax Conventions 33
- Graphics Icons Key 34
- CHAPTER 1 35
- 1.2 Features 36
- 1.3.1 Internet Access 40
- 1.3.5 LEDs 42
- Table 3 LEDs 43
- CHAPTER 2 45
- Figure 6 Password Screen 46
- 2.1.2 The RESET Button 47
- 2.2.1 Title Bar 48
- 2.2.2 Navigation Panel 49
- 2.2.3 Main Window 51
- 2.2.4 Status Bar 51
- CHAPTER 3 53
- Figure 11 Wizard Welcome 54
- 3.2.1 Manual Configuration 55
- LABEL DESCRIPTION 60
- CHAPTER 4 61
- Figure 22 Select a Mode 62
- Figure 23 Wizard: Welcome 62
- Figure 26 VoIP Wizard Fail 65
- CHAPTER 5 67
- Figure 28 Select a Mode 69
- Figure 29 Wizard: Welcome 69
- CHAPTER 6 73
- 74 Chapter 6 Status Screens 74
- Table 16 Status Screen 74
- Chapter 6 Status Screens 75 75
- 6.2 Any IP Table 76
- 6.3 Packet Statistics 77
- 6.4 VoIP Statistics 78
- Chapter 6 Status Screens 79 79
- Figure 36 VoIP Statistics 79
- Table 19 VoIP Statistics 79
- 80 Chapter 6 Status Screens 80
- CHAPTER 7 81
- 7.1.2 Multiplexing 82
- 7.1.3 VPI and VCI 82
- 7.1.4 IP Address Assignment 83
- 7.1.6 NAT 83
- 7.2 Metric 84
- 7.3 Traffic Shaping 84
- 7.3.1 ATM Traffic Classes 85
- 7.5 Internet Access Setup 86
- Chapter 7 WAN Setup 87 87
- 88 Chapter 7 WAN Setup 88
- Chapter 7 WAN Setup 89 89
- 7.6 WAN More Connections 90
- 7.7 Traffic Redirect 91
- 92 Chapter 7 WAN Setup 92
- 7.8 WAN Backup Setup 93
- Check WAN IP Address 94
- CHAPTER 8 95
- 8.1.2 DHCP Setup 96
- 8.1.3 DNS Server Address 96
- 8.2 LAN TCP/IP 97
- 8.2.2 RIP Setup 98
- 8.2.3 Multicast 99
- 8.2.4 Any IP 99
- 8.2.4.1 How Any IP Works 100
- 8.3 Configuring LAN IP 101
- 102 Chapter 8 LAN Setup 102
- Table 25 Advanced LAN Setup 102
- 8.4 DHCP Setup 103
- 8.5 LAN Client List 104
- Figure 48 LAN Client List 105
- Table 27 LAN Client List 105
- Chapter 8 LAN Setup 105 105
- 8.6 LAN IP Alias 106
- Chapter 8 LAN Setup 107 107
- Table 28 LAN IP Alias 107
- 108 Chapter 8 LAN Setup 108
- CHAPTER 9 109
- 9.1.2 What NAT Does 110
- 9.1.3 How NAT Works 110
- 9.1.4 NAT Application 111
- 9.1.5 NAT Mapping Types 111
- 9.3 NAT General Setup 112
- 9.4 Port Forwarding 113
- Figure 55 Port Forwarding 115
- Table 33 Port Forwarding 116
- 9.5.2 SIP ALG 117
- CHAPTER 10 119
- 10.2.2 SIP Call Progression 120
- 10.2.3 SIP Servers 120
- 10.2.3.1 SIP User Agent 121
- 10.2.3.2 SIP Proxy Server 121
- 10.2.3.3 SIP Redirect Server 122
- 10.3 SIP Settings Screen 123
- 124 Chapter 10 Voice 124
- 10.4 Pulse Code Modulation 125
- 10.5 Voice Coding 125
- 10.8 Custom Tones (IVR) 126
- Chapter 10 Voice 127 127
- 128 Chapter 10 Voice 128
- Chapter 10 Voice 129 129
- 130 Chapter 10 Voice 130
- 10.10.2 DiffServ 131
- 10.10.3 VLAN 132
- 10.10.4 SIP QoS Screen 132
- 10.11 Phone 133
- 10.12 Analog Phone 134
- Chapter 10 Voice 135 135
- > Phone > Common 136
- Chapter 10 Voice 137 137
- Figure 67 Phone > Common 137
- Table 43 Phone > Common 137
- 10.14.1 The Flash Key 138
- Chapter 10 Voice 139 139
- 10.14.3.1 USA Call Hold 140
- 10.14.3.2 USA Call Waiting 140
- 10.14.3.3 USA Call Transfer 140
- 10.15 Phone Region Screen 141
- 10.16 Speed Dial 141
- 10.17 Speed Dial Screen 142
- Chapter 10 Voice 143 143
- 144 Chapter 10 Voice 144
- 10.19 PSTN Line Screen 145
- 146 Chapter 10 Voice 146
- CHAPTER 11 147
- 11.5 Auto Firmware Upgrade 148
- CHAPTER 12 149
- 150 Chapter 12 Firewalls 150
- 12.4 Denial of Service 151
- 12.4.2 Types of DoS Attacks 152
- Chapter 12 Firewalls 153 153
- Figure 74 SYN Flood 153
- 12.4.2.1 ICMP Vulnerability 154
- 12.5 Stateful Inspection 155
- 156 Chapter 12 Firewalls 156
- 12.5.3 TCP Security 157
- 12.5.4 UDP/ICMP Security 157
- 12.5.5 Upper Layer Protocols 158
- 12.6.1 Security In General 158
- 12.7.1 Packet Filtering: 159
- 12.7.2 Firewall 160
- CHAPTER 13 161
- 13.3 Rule Logic Overview 162
- 13.4 Connection Direction 163
- 13.4.1 LAN to WAN Rules 164
- 13.4.2 Alerts 164
- 13.6 Firewall Rules Summary 165
- Figure 78 Firewall Rules 166
- Table 55 Firewall Rules 166
- Address 169
- 13.6.2 Customized Services 170
- 13.7 Example Firewall Rule 171
- 10.0.0.15 on the LAN 174
- 13.8 DoS Thresholds 175
- 13.8.2 Half-Open Sessions 176
- CHAPTER 14 179
- CHAPTER 15 183
- 184 Chapter 15 Static Route 184
- Figure 92 Static Route 184
- Table 63 Static Route 184
- 15.2.1 Static Route Edit 185
- 186 Chapter 15 Static Route 186
- CHAPTER 16 187
- 16.5 Scheduler 188
- Sales: 2048 kbps 189
- Marketing: 2048 kbps 189
- Research: 2048 kbps 189
- 16.7 Configuring Summary 191
- 16.8.1 Rule Configuration 194
- 16.9 Bandwidth Monitor 196
- CHAPTER 17 197
- Figure 99 Dynamic DNS 198
- Table 73 Dynamic DNS 198
- Device and the DDNS server 199
- CHAPTER 18 201
- 18.2 WWW 202
- 18.3 Telnet 203
- 18.4 Configuring Telnet 203
- 18.5 Configuring FTP 204
- 18.6 SNMP 205
- 18.6.1 Supported MIBs 207
- 18.6.2 SNMP Traps 207
- 18.6.3 Configuring SNMP 207
- 18.7 Configuring DNS 209
- 18.8 Configuring ICMP 209
- CHAPTER 19 211
- 19.2 UPnP and ZyXEL 212
- Table 81 Configuring UPnP 213
- Components selection box 214
- Figure 118 System Tray Icon 220
- Network 221
- CHAPTER 20 223
- 224 Chapter 20 System 224
- 20.2 Time Setting 225
- 226 Chapter 20 System 226
- Chapter 20 System 227 227
- 228 Chapter 20 System 228
- CHAPTER 21 229
- 230 Chapter 21 Logs 230
- Figure 125 View Log 230
- Table 84 View Log 230
- Chapter 21 Logs 231 231
- Figure 126 Log Settings 231
- Table 85 Log Settings 231
- 232 Chapter 21 Logs 232
- 21.4 SMTP Error Messages 233
- 234 Chapter 21 Logs 234
- CHAPTER 22 235
- 236 Chapter 22 Tools 236
- Chapter 22 Tools 237 237
- Figure 128 Firmware Upgrade 237
- Table 88 Firmware Upgrade 237
- 22.5 Backup and Restore 238
- 22.5.1 Backup Configuration 239
- 240 Chapter 22 Tools 240
- 22.6 Restart 241
- 244 Chapter 22 Tools 244
- Chapter 22 Tools 245 245
- 22.9.3 TFTP File Upload 246
- Chapter 22 Tools 247 247
- 248 Chapter 22 Tools 248
- CHAPTER 23 249
- 250 Chapter 23 Diagnostic 250
- 252 Chapter 23 Diagnostic 252
- CHAPTER 24 253
- 24.3 Problems with the WAN 254
- Figure 143 Pop-up Blocker 256
- Figure 145 Internet Options 258
- 24.4.1.2 JavaScripts 259
- 3 Scroll down to Scripting 260
- 24.4.1.3 Java Permissions 261
- 24.4.1.3.1 JAVA (Sun) 262
- 24.5 Telephone Problems 263
- 24.6.1 Outgoing Calls 264
- 24.6.2 Incoming Calls 265
- Appendix A 267
- Product Specifications 267
- Power Adaptor Specifications 269
- APPENDIX B 271
- APPENDIX C 273
- Installing Components 274
- Configuring 275
- Windows 2000/NT/XP 276
- Verifying Settings 280
- Macintosh OS 8/9 281
- Macintosh OS X 282
- APPENDIX D 285
- Subnet Masks 286
- Subnetting 286
- Example: Two Subnets 287
- 288 Appendix D IP Subnetting 288
- Table 107 Subnet 1 288
- Table 108 Subnet 2 288
- Example: Four Subnets 289
- Example Eight Subnets 290
- Appendix D IP Subnetting 291 291
- 292 Appendix D IP Subnetting 292
- Appendix E 293
- Services 293
- 294 Appendix E Services 294
- Appendix E Services 295 295
- 296 Appendix E Services 296
- APPENDIX F 297
- APPENDIX G 299
- IP Aliasing 300
- Gateways on the WAN Side 301
- 302 Appendix G Triangle Route 302
- APPENDIX H 303
- Table 119 System Error Logs 304
- Table 121 TCP Reset Logs 305
- Table 123 ICMP Logs 305
- Table 124 CDR Logs 306
- Table 125 PPP Logs 306
- Table 126 UPnP Logs 307
- Table 128 Attack Logs 307
- Table 129 802.1X Logs 308
- Table 130 ACL Setting Notes 309
- Table 131 ICMP Notes 309
- Table 132 Syslog Logs 310
- Table 133 SIP Logs 310
- Log Commands 312
- Displaying Logs 313
- Log Command Example 314
- APPENDIX I 315
- APPENDIX J 317
- Table 141 Menu 3 320
- Table 143 Menu 12 325
- Command Examples 340
- Index 343 343
- 344 Index 344
- Index 345 345
- 346 Index 346
- Index 347 347
- 348 Index 348
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