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Prestige 2602R Series User’s Guide
Chapter 12 Firewalls 147
• A range of source and destination IP addresses as well as port numbers can be specified
within one firewall rule making the firewall a better choice when complex rules are
required.
• 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.
- Prestige 2602R Series 1
- Copyright 3
- Federal Communications 4
- Statement 4
- Safety Warnings 5
- ZyXEL Limited Warranty 6
- Customer Support 7
- 8 Customer Support 8
- Table of Contents 9
- Chapter 6 11
- Chapter 7 11
- Chapter 8 12
- Chapter 13 14
- Chapter 14 14
- Table of Contents 23 23
- 24 Table of Contents 24
- List of Figures 25
- 32 List of Figures 32
- List of Tables 33
- About This User's Guide 37
- Related Documentation 37
- User Guide Feedback 37
- Syntax Conventions 38
- Graphics Icons Key 38
- Introduction to DSL 39
- 40 Introduction to DSL 40
- CHAPTER 1 41
- 1.2.1 Internet Access 46
- 1.2.5 LAN to LAN Application 48
- 1.2.6 Front Panel LEDs 48
- CHAPTER 2 51
- 2.1.2 Resetting the Prestige 52
- CHAPTER 3 57
- 58 Chapter 3 Wizard Setup 58
- Chapter 3 Wizard Setup 59 59
- 60 Chapter 3 Wizard Setup 60
- Chapter 3 Wizard Setup 61 61
- 62 Chapter 3 Wizard Setup 62
- Chapter 3 Wizard Setup 63 63
- 64 Chapter 3 Wizard Setup 64
- Chapter 3 Wizard Setup 65 65
- 66 Chapter 3 Wizard Setup 66
- Chapter 3 Wizard Setup 67 67
- 68 Chapter 3 Wizard Setup 68
- Chapter 3 Wizard Setup 69 69
- 3.3 Password Setup 70
- CHAPTER 4 71
- 4.2 DNS Server Address 72
- 4.4 LAN TCP/IP 73
- 4.5 LAN TCP/IP 73
- 4.5.2 RIP Setup 74
- 4.6 Any IP 75
- 4.6.1 How Any IP Works 76
- 4.7 Configuring LAN 77
- 78 Chapter 4 LAN Setup 78
- Table 15 LAN Setup 78
- CHAPTER 5 79
- 5.1.2 Multiplexing 80
- 5.1.3 VPI and VCI 80
- 5.1.4 IP Address Assignment 80
- 5.2 Metric 81
- 5.3 PPPoE Encapsulation 82
- 5.4 Traffic Shaping 82
- 5.6 Configuring WAN Setup 83
- 84 Chapter 5 WAN Setup 84
- Figure 27 WAN Setup (PPPoE) 84
- Table 16 WAN Setup 84
- Chapter 5 WAN Setup 85 85
- 5.7 Traffic Redirect 86
- 5.8 Configuring WAN Backup 87
- IP address here 88
- Check WAN IP Address 89
- 90 Chapter 5 WAN Setup 90
- CHAPTER 6 91
- 6.1.2 What NAT Does 92
- 6.1.3 How NAT Works 92
- 6.1.4 NAT Application 93
- 6.1.5 NAT Mapping Types 93
- Table 19 NAT Mapping Types 94
- 6.3 SUA Server 95
- 6.4 Selecting the NAT Mode 96
- 6.5 Configuring SUA Server 97
- CHAPTER 7 103
- 7.2.2 SIP Call Progression 104
- 7.2.3 SIP Servers 104
- 7.2.3.1 SIP User Agent 105
- 7.2.3.2 SIP Proxy Server 105
- 7.2.4 RTP 106
- 7.5 Voice Coding 107
- 7.3 SIP ALG 107
- 7.4 Pulse Code Modulation 107
- RFC 3842 108
- CHAPTER 8 109
- 110 Chapter 8 Voice Screens 110
- Table 26 SIP Settings 110
- Chapter 8 Voice Screens 111 111
- 112 Chapter 8 Voice Screens 112
- 8.4 Quality of Service (QoS) 113
- 8.5 QoS Configuration 114
- 8.6 Phone 115
- 8.7 Phone Configuration 115
- 116 Chapter 8 Voice Screens 116
- Figure 45 Phone 116
- Table 29 Phone 116
- 8.8 Speed Dial 117
- 8.9 Speed Dial Configuration 117
- 118 Chapter 8 Voice Screens 118
- Figure 46 Speed Dial 118
- Table 30 Speed Dial 118
- 8.10.1 The Flash Key 119
- 8.10.2.1 European Call Hold 120
- Chapter 8 Voice Screens 121 121
- 8.10.3.1 USA Call Hold 122
- 8.10.3.2 USA Call Waiting 122
- 8.10.3.3 USA Call Transfer 122
- Chapter 8 Voice Screens 123 123
- Figure 47 Phone Port Common 123
- Table 33 Voice Common 123
- 124 Chapter 8 Voice Screens 124
- Chapter 8 Voice Screens 125 125
- Table 34 Voice Call Forward 125
- 126 Chapter 8 Voice Screens 126
- CHAPTER 9 127
- 9.5 Auto Firmware Upgrade 128
- CHAPTER 10 129
- Figure 49 Dynamic DNS 130
- Table 35 Dynamic DNS 130
- CHAPTER 11 131
- 132 Chapter 11 Time and Date 132
- Figure 50 Time and Date 132
- Table 37 Time and Date 132
- Chapter 11 Time and Date 133 133
- 134 Chapter 11 Time and Date 134
- CHAPTER 12 135
- 136 Chapter 12 Firewalls 136
- 12.4 Denial of Service 137
- 12.4.2 Types of DoS Attacks 138
- Chapter 12 Firewalls 139 139
- Figure 53 SYN Flood 139
- 12.4.2.1 ICMP Vulnerability 140
- 12.5 Stateful Inspection 141
- 142 Chapter 12 Firewalls 142
- 12.5.3 TCP Security 143
- 12.5.4 UDP/ICMP Security 144
- 12.5.5 Upper Layer Protocols 144
- 12.6.1 Security In General 145
- 12.7.1 Packet Filtering: 146
- 12.7.2 Firewall 146
- Chapter 12 Firewalls 147 147
- 148 Chapter 12 Firewalls 148
- CHAPTER 13 149
- 13.3 Rule Logic Overview 150
- 13.3.3.1 Action 151
- 13.3.3.2 Service 151
- 13.3.3.3 Source Address 151
- 13.3.3.4 Destination Address 151
- 13.4.1 LAN to WAN Rules 152
- 13.4.2 WAN to LAN Rules 152
- 13.4.3 Alerts 152
- 13.6 Rule Summary 154
- Address 157
- 13.7 Customized Services 158
- 13.9 Example Firewall Rule 159
- 13.10 Predefined Services 163
- 13.11 Anti-Probing 165
- 13.12 DoS Thresholds 166
- 13.12.1 Threshold Values 167
- 13.12.2 Half-Open Sessions 167
- CHAPTER 14 171
- CHAPTER 15 175
- 15.2 Telnet 176
- 15.3 FTP 176
- 15.4 Web 177
- CHAPTER 16 179
- 16.2 UPnP and ZyXEL 180
- Table 54 Configuring UPnP 181
- Components selection box 182
- Figure 85 System Tray Icon 189
- Network 190
- CHAPTER 17 193
- 194 Chapter 17 Logs Screens 194
- Figure 90 Log Settings 194
- Table 55 Log Settings 194
- 17.3 Displaying the Logs 195
- 17.4 SMTP Error Messages 196
- 17.4.1 Example E-mail Log 197
- 198 Chapter 17 Logs Screens 198
- CHAPTER 18 199
- 18.5 Scheduler 201
- 18.7 Bandwidth Borrowing 204
- 18.8 Configuring Summary 205
- 18.9 Configuring Class Setup 207
- 18.10 Bandwidth Monitor 211
- LABEL DESCRIPTION 212
- CHAPTER 19 213
- 214 Chapter 19 Maintenance 214
- Figure 104 System Status 214
- Chapter 19 Maintenance 215 215
- Table 65 System Status 215
- 19.2.1 System Statistics 216
- 19.3 DHCP Table Screen 217
- 19.4 Any IP Table Screen 218
- 19.5 Diagnostic Screens 219
- 220 Chapter 19 Maintenance 220
- 19.6 Firmware Screen 221
- 222 Chapter 19 Maintenance 222
- Figure 110 Firmware Upgrade 222
- Table 71 Firmware Upgrade 222
- Chapter 19 Maintenance 223 223
- Figure 112 Error Message 223
- 224 Chapter 19 Maintenance 224
- CHAPTER 20 225
- ? > or 226
- Table 73 SMT Main Menu 227
- Table 74 Main Menu Summary 227
- 20.2.2 SMT Menus Overview 228
- 1234", and 229
- *” for each character 230
- CHAPTER 21 231
- CHAPTER 22 235
- Press ENTER to Confirm 237
- CHAPTER 23 239
- CHAPTER 24 243
- 24.4 IP Alias Setup 244
- 24.5 Route IP Setup 245
- CHAPTER 25 249
- 25.4 Remote Node Filter 255
- 25.5.3 Advance Setup Options 257
- CHAPTER 26 259
- CHAPTER 27 263
- CHAPTER 28 267
- 28.3 NAT Setup 269
- Menu 15.1.255 is read-only 270
- 28.3.1.3 Ordering Your Rules 271
- 28.5 General NAT Examples 274
- Figure 154 NAT Example 1 275
- Figure 156 NAT Example 2 276
- Figure 158 NAT Example 3 277
- Figure 163 NAT Example 4 280
- CHAPTER 29 283
- CHAPTER 30 285
- Filter Rule 286
- Filter Set 286
- Len Length 289
- 30.4.1 TCP/IP Filter Rule 290
- 30.4.2 Generic Filter Rule 293
- 30.5 Filter Types and NAT 294
- 30.6 Example Filter 295
- 30.7.1 Ethernet Traffic 297
- 30.7.2 Remote Node Filters 298
- CHAPTER 31 299
- 31.2 Supported MIBs 300
- 31.3 SNMP Configuration 300
- 31.4 SNMP Traps 301
- CHAPTER 32 303
- 32.3 System Information 305
- 32.3.2 Console Port Speed 306
- 32.4 Log and Trace 307
- 32.4.2 Syslog and Accounting 308
- Figure 192 Syslog Example 309
- 32.5 Diagnostic 310
- CHAPTER 33 313
- 33.2 Backup Configuration 314
- 33.2.4 GUI-based FTP Clients 316
- 33.2.7 TFTP Command Example 317
- 33.3 Restore Configuration 318
- 33.4.1 Firmware File Upload 320
- 33.4.5 TFTP File Upload 322
- CHAPTER 34 325
- 34.2 Call Control Support 326
- 34.3 Time and Date Setting 327
- 34.3.1 Resetting the Time 329
- CHAPTER 35 331
- 35.4 System Timeout 333
- CHAPTER 36 335
- 36.4 IP Routing Policy Setup 336
- 36.5 Applying an IP Policy 339
- (192.168.1.100) 342
- CHAPTER 37 343
- CHAPTER 38 347
- 38.3 Problems with the WAN 348
- Figure 220 Pop-up Blocker 350
- Figure 222 Internet Options 352
- 38.4.1.2 JavaScripts 353
- 3 Scroll down to Scripting 354
- 38.4.1.3 Java Permissions 355
- 38.4.1.3.1 JAVA (Sun) 356
- 38.5 Telephone Problems 357
- Appendix A 359
- Product Specifications 359
- Appendix B 363
- Installing Components 364
- Configuring 365
- Windows 2000/NT/XP 366
- Macintosh OS 8/9 371
- Macintosh OS X 373
- Verifying Settings 374
- Using Configuration Files 376
- APPENDIX C 379
- How PPPoE Works 380
- Prestige as a PPPoE Client 380
- APPENDIX D 381
- Subnet Masks 382
- Subnetting 382
- Example: Two Subnets 383
- 384 Appendix D IP Subnetting 384
- Table 128 Subnet 1 384
- Table 129 Subnet 2 384
- Example: Four Subnets 385
- Example Eight Subnets 386
- Appendix D IP Subnetting 387 387
- 388 Appendix D IP Subnetting 388
- APPENDIX E 389
- IP Aliasing 390
- Gateways on the WAN Side 391
- APPENDIX F 393
- APPENDIX G 395
- Command Examples 418
- APPENDIX H 421
- APPENDIX I 423
- APPENDIX J 425
- 426 Appendix J Boot Commands 426
- APPENDIX K 427
- Table 152 TCP Reset Logs 429
- Table 154 ICMP Logs 429
- Table 155 CDR Logs 430
- Table 156 PPP Logs 430
- Table 157 UPnP Logs 431
- Table 159 Attack Logs 431
- Table 161 ICMP Notes 432
- Table 162 Syslog Logs 433
- Table 163 SIP Logs 433
- Table 164 RTP Logs 434
- Log Commands 435
- Displaying Logs 436
- Log Command Example 437
- Numerics 439
- 440 Index 440
- 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
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