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Chapter 10 Firewalls
P-660HWP-Dx User’s Guide
46
• 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-660HWP-Dx 1
- About This User's Guide 3
- Document Conventions 4
- Icons Used in Figures 5
- Safety Warnings 6
- Safety Warnings 7
- Contents Overview 10
- P-660HWP-Dx User’s Guide 10
- Table of Contents 11
- Chapter 6 13
- Chapter 7 13
- Chapter 8 14
- Chapter 9 14
- Chapter 10 15
- Chapter 11 15
- List of Figures 21
- List of Tables 27
- List of Tables 31
- Introduction 33
- CHAPTER 1 35
- Table 1 ADSL Standards 36
- 1.4 LEDs 37
- 1.5 Hardware Connections 38
- 1.5.2 Telephone Microfilters 39
- 1.5.3 P-660HWP-Dx With ISDN 40
- CHAPTER 2 43
- 2.2.1 User Access 44
- 2.2.2 Administrator Access 44
- Figure 11 Select a Mode 45
- 2.3.1 Using the Reset Button 46
- 2.4.1 Navigation Panel 46
- 2.4.2 Status Screen 49
- Table 4 Status Screen 50
- 2.4.3 Status: Any IP Table 51
- 2.4.4 Status: WLAN Status 52
- Figure 17 Status: Powerline 53
- Figure 19 System General 55
- CHAPTER 3 59
- Figure 20 Select a Mode 60
- Figure 21 Wizard: Welcome 60
- 3.2.1 Automatic Detection 61
- 3.2.2 Manual Configuration 62
- CHAPTER 4 73
- Figure 39 Select a Mode 74
- Figure 40 Wizard: Welcome 75
- PART III 79
- CHAPTER 5 81
- 5.1.2 Multiplexing 82
- 5.1.4 VPI and VCI 83
- 5.1.5 IP Address Assignment 83
- 5.2 Metric 84
- 5.3 Traffic Shaping 84
- 5.3.1 ATM Traffic Classes 85
- 5.5 Internet Connection 86
- Chapter 5 WAN Setup 87
- Chapter 5 WAN Setup 88
- Figure 47 More Connections 90
- 5.6.1 More Connections Edit 91
- 5.7 Traffic Redirect 95
- 5.8 Configuring WAN Backup 95
- Figure 52 WAN Backup Setup 96
- Table 25 WAN Backup Setup 96
- CHAPTER 6 99
- 6.1.2 DHCP Setup 100
- 6.1.3 DNS Server Address 100
- 6.2 LAN TCP/IP 101
- 6.2.2 RIP Setup 102
- 6.2.3 Multicast 102
- 6.2.4 Any IP 103
- 6.3 Configuring LAN IP 104
- Chapter 6 LAN Setup 105
- Table 26 LAN IP 105
- Table 27 Advanced LAN Setup 105
- 6.4 DHCP Setup 106
- 6.5 LAN Client List 107
- 6.6 LAN IP Alias 108
- Figure 60 LAN IP Alias 109
- Chapter 6 LAN Setup 110
- Table 30 LAN IP Alias 110
- CHAPTER 7 111
- 7.2 Wireless Network Setup 112
- 7.3.1 SSID 113
- 7.3.2 MAC Address Filter 113
- 7.3.3 User Authentication 114
- 7.3.4 Encryption 114
- Chapter 7 Wireless LAN 115
- 7.4.1 No Security 116
- 7.4.2 WEP Encryption 117
- 7.4.3 WPA-PSK/WPA2-PSK 118
- 7.4.4 WPA/WPA2 120
- RADIUS server has priority 121
- Chapter 7 Wireless LAN 122
- Figure 67 Advanced 122
- 7.5 OTIST 123
- Figure 68 OTIST 124
- Table 38 OTIST 124
- 7.5.2 Starting OTIST 125
- 7.5.3 Notes on OTIST 126
- 7.6 MAC Filter 127
- 7.7 WMM QoS 128
- 7.7.3 Services 129
- 7.8 QoS Screen 131
- Figure 76 Wireless LAN: QoS 132
- Table 42 Wireless Lan: QoS 132
- CHAPTER 8 135
- P-660HWP-Dx and 136
- Chapter 8 Powerline 137
- Chapter 8 Powerline 138
- CHAPTER 9 143
- 9.1.2 What NAT Does 144
- 9.1.3 How NAT Works 144
- 9.1.4 NAT Application 144
- 9.1.5 NAT Mapping Types 145
- 9.3 SIP ALG 146
- 9.4 NAT General Setup 147
- 9.5 Port Forwarding 148
- 9.7 Address Mapping 151
- Security 155
- CHAPTER 10 157
- Chapter 10 Firewalls 158
- 10.4 Denial of Service 159
- 10.4.2 Types of DoS Attacks 160
- Chapter 10 Firewalls 161
- Figure 94 SYN Flood 161
- Figure 95 Smurf Attack 161
- 10.5 Stateful Inspection 162
- 10.5.3 TCP Security 164
- 10.5.4 UDP/ICMP Security 165
- 10.5.5 Upper Layer Protocols 165
- 10.6.1 Security In General 166
- 10.7.1 Packet Filtering: 167
- 10.7.2 Firewall 167
- CHAPTER 11 169
- 11.3 Rule Logic Overview 170
- 11.4 Connection Direction 171
- 11.4.1 LAN to WAN Rules 172
- 11.4.2 Alerts 172
- 11.6 Firewall Rules Summary 173
- Figure 98 Firewall Rules 174
- Table 60 Firewall Rules 174
- 11.6.2 Customized Services 178
- 11.7 Example Firewall Rule 179
- 10.0.0.15 on the LAN 182
- 11.8 Predefined Services 183
- 11.9 Anti-Probing 185
- 11.10 DoS Thresholds 186
- 11.10.2 Half-Open Sessions 187
- CHAPTER 12 191
- Chapter 12 Content Filtering 192
- Chapter 12 Content Filtering 193
- CHAPTER 13 195
- 13.3 Verifying a Certificate 196
- 13.4 Configuration Summary 197
- 13.5 My Certificates 198
- Chapter 13 Certificates 199
- Chapter 13 Certificates 200
- 13.9 Trusted CAs 206
- 13.10 Trusted CA Details 207
- 13.15 Directory Servers 215
- Advanced 217
- CHAPTER 14 219
- 14.2.1 Static Route Edit 220
- Chapter 14 Static Route 221
- Table 84 Static Route Edit 221
- Chapter 14 Static Route 222
- CHAPTER 15 223
- 15.5 Scheduler 224
- 15.8 Configuring Summary 228
- 15.10 DiffServ 230
- 15.10.2 Rule Configuration 231
- 15.11 Bandwidth Monitor 234
- CHAPTER 16 235
- Chapter 16 Dynamic DNS Setup 236
- Figure 135 Dynamic DNS 236
- Table 97 Dynamic DNS 236
- Chapter 16 Dynamic DNS Setup 237
- CHAPTER 17 239
- 17.2 WWW 240
- 17.3 Telnet 241
- 17.4 Configuring Telnet 242
- 17.5 Configuring FTP 242
- 17.6 SNMP 243
- 17.6.1 Supported MIBs 244
- 17.6.2 SNMP Traps 245
- 17.6.3 Configuring SNMP 245
- 17.7 Configuring DNS 246
- 17.8 Configuring ICMP 247
- 17.9 TR-069 248
- Figure 144 Enabling TR-069 249
- Table 105 TR-069 Commands 249
- CHAPTER 18 251
- 18.2 UPnP and ZyXEL 252
- Table 106 Configuring UPnP 253
- Figure 155 System Tray Icon 258
- Network 260
- Maintenance and 263
- Troubleshooting 263
- CHAPTER 19 265
- Chapter 19 System 266
- 19.2 Time Setting 267
- Chapter 19 System 269
- CHAPTER 20 271
- Chapter 20 Logs 272
- Figure 162 View Log 272
- Table 109 View Log 272
- Chapter 20 Logs 273
- Figure 163 Log Settings 273
- Table 110 Log Settings 273
- 20.3.1 Example E-mail Log 274
- 20.4 Log Descriptions 275
- Table 112 System Error Logs 276
- Table 114 TCP Reset Logs 277
- Table 116 ICMP Logs 278
- Table 117 CDR Logs 278
- Table 118 PPP Logs 278
- Table 119 UPnP Logs 279
- Table 121 Attack Logs 280
- Table 122 IPSec Logs 280
- Table 123 IKE Logs 281
- Table 124 PKI Logs 284
- Table 126 ACL Setting Notes 285
- Table 127 ICMP Notes 286
- Table 128 Syslog Logs 287
- CHAPTER 21 289
- Chapter 21 Tools 290
- 21.2 Configuration Screen 291
- 21.2.2 Restore Configuration 292
- 21.3 Restart 293
- CHAPTER 22 295
- 22.2 DSL Line Diagnostic 296
- CHAPTER 23 297
- V I forgot the password 298
- 23.3 Internet Access 299
- Chapter 23 Troubleshooting 300
- 23.4 Powerline Issues 301
- PART VII 303
- APPENDIX A 305
- 660HWP-Dx 308
- Wall-mounting Instructions 309
- APPENDIX B 311
- Appendix B Wireless LANs 312
- Appendix B Wireless LANs 313
- Fragmentation Threshold 314
- Preamble Type 315
- IEEE 802.11g Wireless LAN 315
- Wireless Security Overview 315
- IEEE 802.1x 316
- Types of EAP Authentication 317
- PEAP (Protected EAP) 318
- Dynamic WEP Key Exchange 319
- WPA and WPA2 319
- Encryption 320
- User Authentication 320
- Security Parameters Summary 322
- Antenna Overview 322
- Antenna Characteristics 323
- Types of Antennas for WLAN 323
- Positioning Antennas 323
- APPENDIX C 325
- Example Internal SPTGEN Menus 328
- Appendix C Internal SPTGEN 329
- Table 145 Menu 3 329
- Appendix C Internal SPTGEN 330
- Table 147 Menu 12 332
- Command Examples 339
- APPENDIX D 341
- Installing Components 342
- Configuring 343
- Windows 2000/NT/XP 344
- Macintosh OS 8/9 349
- Macintosh OS X 351
- Verifying Settings 352
- Using Configuration Files 354
- APPENDIX E 357
- Subnet Masks 358
- Subnetting 358
- Example: Two Subnets 359
- Appendix E IP Subnetting 360
- Table 159 Subnet 1 360
- Table 160 Subnet 2 360
- Example: Four Subnets 361
- Example Eight Subnets 362
- Appendix E IP Subnetting 363
- APPENDIX F 365
- Log Commands 366
- Log Command Example 367
- APPENDIX G 369
- Appendix G Firewall Commands 370
- Appendix G Firewall Commands 371
- APPENDIX H 375
- JavaScripts 378
- Java Permissions 379
- JAVA (Sun) 380
- APPENDIX I 381
- NetBIOS Filter Configuration 382
- APPENDIX J 383
- IP Aliasing 384
- APPENDIX K 385
- ZyXEL Limited Warranty 387
- Appendix K Legal Information 388
- APPENDIX L 389
- Appendix L Customer Support 390
- Appendix L Customer Support 391
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