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P-660HW-D Series User’s Guide
147 Chapter 9 Firewalls
Figure 83 Smurf Attack
9.4.2.1 ICMP Vulnerability
ICMP is an error-reporting protocol that works in concert with IP. The following ICMP types
trigger an alert:
9.4.2.2 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 53 ICMP Commands That Trigger Alerts
5 REDIRECT
13 TIMESTAMP_REQUEST
14 TIMESTAMP_REPLY
17 ADDRESS_MASK_REQUEST
18 ADDRESS_MASK_REPLY
Table 54 Legal NetBIOS Commands
MESSAGE:
REQUEST:
POSITIVE:
VE:
RETARGET:
KEEPALIVE:
Table 55 Legal SMTP Commands
AUTH DATA EHLO ETRN EXPN HELO HELP MAIL NOOP
QUIT RCPT RSET SAML SEND SOML TURN VRFY
- P-660HW-D Series 1
- Copyright 3
- Federal Communications 4
- Commission (FCC) Interference 4
- Statement 4
- Certifications 5
- Safety Warnings 6
- ZyXEL Limited Warranty 7
- Customer Support 8
- Customer Support 8 9
- P-660HW-D Series User’s Guide 10
- 9 Customer Support 10
- Table of Contents 11
- Chapter 6 13
- Chapter 7 13
- Chapter 8 14
- Chapter 9 15
- Chapter 10 15
- List of Figures 21
- 25 List of Figures 26
- List of Tables 27
- About This User's Guide 31
- Syntax Conventions 31
- Related Documentation 31
- User Guide Feedback 32
- Graphics Icons Key 32
- CHAPTER 1 33
- 1.2 Features 34
- 1.2.1 Wireless Features 36
- 1.3.2 LAN to LAN Application 37
- 1.4 Front Panel LEDs 38
- 1.5 Hardware Connection 39
- CHAPTER 2 41
- Figure 4 Password Screen 42
- 2.3.1 Using the Reset Button 43
- 2.4.1 Navigation Panel 43
- 2.4.2 Status Screen 46
- Figure 8 Status Screen 47
- Table 4 Status Screen 47
- 2.4.3 Status: Any IP Table 49
- 2.4.4 Status: WLAN Status 49
- Table 6 Status: WLAN Status 50
- Figure 13 System General 52
- CHAPTER 3 53
- Figure 15 Wizard: Welcome 54
- 3.2.1 Automatic Detection 55
- 3.2.2 Manual Configuration 55
- CHAPTER 4 67
- Figure 33 Select a Mode 68
- Figure 34 Wizard: Welcome 69
- CHAPTER 5 75
- 5.1.2 Multiplexing 76
- 5.1.4 VPI and VCI 77
- 5.1.5 IP Address Assignment 77
- 5.2 Metric 78
- 5.3 Traffic Shaping 79
- 5.3.1 ATM Traffic Classes 80
- 5.5 Internet Connection 81
- 81 Chapter 5 WAN Setup 82
- Chapter 5 WAN Setup 82 83
- 83 Chapter 5 WAN Setup 84
- 5.6.1 More Connections Edit 85
- 85 Chapter 5 WAN Setup 86
- Chapter 5 WAN Setup 86 87
- 87 Chapter 5 WAN Setup 88
- 5.7 Traffic Redirect 89
- 5.8 Configuring WAN Backup 90
- Check WAN IP Address 91
- 91 Chapter 5 WAN Setup 92
- CHAPTER 6 93
- 6.1.2 DHCP Setup 94
- 6.1.3 DNS Server Address 94
- 6.2 LAN TCP/IP 95
- 6.2.2 RIP Setup 96
- 6.2.3 Multicast 97
- 6.2.4 Any IP 97
- 6.2.4.1 How Any IP Works 98
- 6.3 Configuring LAN IP 99
- 99 Chapter 6 LAN Setup 100
- Table 27 Advanced LAN Setup 100
- 6.4 DHCP Setup 101
- 6.5 LAN Client List 102
- 6.6 LAN IP Alias 103
- Figure 54 LAN IP Alias 104
- Table 30 LAN IP Alias 104
- 103 Chapter 6 LAN Setup 104
- Chapter 6 LAN Setup 104 105
- 105 Chapter 6 LAN Setup 106
- CHAPTER 7 107
- 7.2.1 SSID 108
- 7.2.2 MAC Address Filter 108
- 7.2.3 User Authentication 109
- 7.2.4 Encryption 109
- 109 Chapter 7 Wireless LAN 110
- Chapter 7 Wireless LAN 110 111
- 7.4.1 No Security 112
- 7.4.2 WEP Encryption 113
- 7.4.3 WPA-PSK/WPA2-PSK 114
- 7.4.4 WPA/WPA2 115
- 115 Chapter 7 Wireless LAN 116
- Table 36 Wireless: WPA/WPA2 116
- Chapter 7 Wireless LAN 116 117
- 117 Chapter 7 Wireless LAN 118
- Figure 61 Advanced 118
- 7.5 OTIST 119
- 119 Chapter 7 Wireless LAN 120
- Figure 62 OTIST 120
- Table 38 OTIST 120
- 7.5.2 Starting OTIST 121
- 7.5.3 Notes on OTIST 122
- 7.6 MAC Filter 123
- 7.7 WMM QoS 124
- 7.7.2 WMM QoS Priorities 125
- 7.7.3 Services 125
- 125 Chapter 7 Wireless LAN 126
- 7.8 QoS Screen 127
- 127 Chapter 7 Wireless LAN 128
- Figure 70 Wireless LAN: QoS 128
- Table 42 Wireless LAN: QoS 128
- Chapter 7 Wireless LAN 128 129
- 129 Chapter 7 Wireless LAN 130
- CHAPTER 8 131
- 8.1.2 What NAT Does 132
- 8.1.3 How NAT Works 132
- 8.1.4 NAT Application 133
- 8.1.5 NAT Mapping Types 133
- 8.3 NAT General Setup 134
- 8.4 Port Forwarding 135
- 8.6 Address Mapping 139
- CHAPTER 9 143
- 143 Chapter 9 Firewalls 144
- 9.4 Denial of Service 145
- 9.4.2 Types of DoS Attacks 146
- Chapter 9 Firewalls 146 147
- Figure 82 SYN Flood 147
- 9.4.2.1 ICMP Vulnerability 148
- 9.5 Stateful Inspection 149
- 149 Chapter 9 Firewalls 150
- 9.5.3 TCP Security 151
- 9.5.4 UDP/ICMP Security 151
- 9.5.5 Upper Layer Protocols 152
- 9.6.1 Security In General 152
- 9.7.1 Packet Filtering: 153
- 9.7.2 Firewall 154
- CHAPTER 10 155
- 10.3 Rule Logic Overview 156
- 10.4 Connection Direction 157
- 10.4.1 LAN to WAN Rules 158
- 10.4.2 Alerts 158
- 10.6 Firewall Rules Summary 159
- Figure 86 Firewall Rules 160
- Table 57 Firewall Rules 160
- 10.6.2 Customized Services 164
- 10.7 Example Firewall Rule 165
- 10.0.0.15 on the LAN 168
- 10.8 Predefined Services 169
- 10.9 Anti-Probing 171
- 10.10 DoS Thresholds 172
- 10.10.2 Half-Open Sessions 173
- CHAPTER 11 177
- CHAPTER 12 181
- 12.2.1 Static Route Edit 182
- Chapter 12 Static Route 182 183
- Table 68 Static Route Edit 183
- 183 Chapter 12 Static Route 184
- CHAPTER 13 185
- 13.5 Scheduler 186
- 13.8 Configuring Summary 190
- 13.9.1 Rule Configuration 193
- 13.10 Bandwidth Monitor 195
- CHAPTER 14 197
- Figure 108 Dynamic DNS 198
- Table 79 Dynamic DNS 198
- CHAPTER 15 201
- 15.2 WWW 202
- 15.3 Telnet 203
- 15.4 Configuring Telnet 203
- 15.5 Configuring FTP 204
- 15.6 SNMP 205
- 15.6.1 Supported MIBs 206
- 15.6.2 SNMP Traps 207
- 15.6.3 Configuring SNMP 207
- 15.7 Configuring DNS 208
- 15.8 Configuring ICMP 209
- CHAPTER 16 211
- 16.2 UPnP and ZyXEL 212
- Table 87 Configuring UPnP 213
- Components selection box 214
- Figure 127 System Tray Icon 218
- Network 220
- CHAPTER 17 223
- 223 Chapter 17 System 224
- 17.2 Time Setting 225
- 225 Chapter 17 System 226
- Chapter 17 System 226 227
- 227 Chapter 17 System 228
- CHAPTER 18 229
- 229 Chapter 18 Logs 230
- Figure 134 View Log 230
- Table 90 View Log 230
- Chapter 18 Logs 230 231
- Figure 135 Log Settings 231
- Table 91 Log Settings 231
- 231 Chapter 18 Logs 232
- 18.3.1 Example E-mail Log 233
- 233 Chapter 18 Logs 234
- CHAPTER 19 235
- 235 Chapter 19 Tools 236
- 19.2 Configuration Screen 237
- 19.2.2 Restore Configuration 238
- 19.3 Restart 239
- 239 Chapter 19 Tools 240
- CHAPTER 20 241
- 20.2 DSL Line Diagnostic 242
- CHAPTER 21 243
- 21.3 Problems with the WAN 244
- APPENDIX A 247
- Table 101 Firmware 248
- APPENDIX B 251
- 251 Appendix B About ADSL 252
- APPENDIX C 253
- APPENDIX D 255
- Installing Components 256
- Configuring 257
- Windows 2000/NT/XP 258
- Macintosh OS 8/9 263
- Macintosh OS X 265
- Verifying Settings 266
- Using Configuration Files 268
- 21.4.1 Verifying Settings 270
- APPENDIX E 271
- Subnet Masks 272
- Subnetting 272
- Example: Two Subnets 273
- 273 Appendix E IP Subnetting 274
- Table 107 Subnet 1 274
- Table 108 Subnet 2 274
- Example: Four Subnets 275
- Example Eight Subnets 276
- Appendix E IP Subnetting 276 277
- 277 Appendix E IP Subnetting 278
- APPENDIX F 279
- APPENDIX G 281
- APPENDIX H 287
- NetBIOS Filter Configuration 288
- APPENDIX I 289
- How PPPoE Works 290
- APPENDIX J 291
- ZyXEL device With ISDN 293
- APPENDIX K 295
- Table 119 System Error Logs 296
- Table 121 TCP Reset Logs 297
- Table 123 ICMP Logs 298
- Table 124 CDR Logs 298
- Table 125 PPP Logs 298
- Table 126 UPnP Logs 299
- Table 128 Attack Logs 300
- Table 129 IPSec Logs 301
- Table 130 IKE Logs 301
- Table 131 PKI Logs 304
- Table 133 802.1X Logs 306
- Table 134 ACL Setting Notes 307
- Table 135 ICMP Notes 307
- Table 136 Syslog Logs 308
- Log Commands 309
- Log Command Example 310
- APPENDIX L 311
- 311 Appendix L Wireless LANs 312
- Appendix L Wireless LANs 312 313
- Fragmentation Threshold 314
- Preamble Type 315
- IEEE 802.11g Wireless LAN 315
- Wireless Security Overview 316
- IEEE 802.1x 316
- Types of RADIUS Messages 317
- Types of Authentication 318
- Dynamic WEP Key Exchange 319
- WPA and WPA2 320
- User Authentication 321
- 321 Appendix L Wireless LANs 322
- Security Parameters Summary 323
- 323 Appendix L Wireless LANs 324
- APPENDIX M 325
- Figure 188 Internet Options 327
- JavaScripts 328
- 3 Scroll down to Scripting 329
- Java Permissions 330
- JAVA (Sun) 331
- Figure 193 Java (Sun) 332
- Numerics 333
- 333 Index 334
- Index 334 335
- 335 Index 336
- Index 336 337
- 337 Index 338
- Index 338 339
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