Zyxel-communications ADSL VoIP IAD with 802.11g Wireless 2602HW Series Bedienungsanleitung Seite 160
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160 Chapter 13 Firewalls
amount of ICMP echo request and response traffic. If a hacker chooses to spoof the
source IP address of the ICMP echo request packet, the resulting ICMP traffic will not
only clog up the "intermediary" network, but will also congest the network of the spoofed
source IP address, known as the "victim" network. This flood of broadcast traffic
consumes all available bandwidth, making communications impossible.
Figure 63 Smurf Attack
13.4.2.1 ICMP Vulnerability
ICMP is an error-reporting protocol that works in concert with IP. The following ICMP types
trigger an alert:
13.4.2.2 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 44 ICMP Commands That Trigger Alerts
5 REDIRECT
13 TIMESTAMP_REQUEST
14 TIMESTAMP_REPLY
17 ADDRESS_MASK_REQUEST
18 ADDRESS_MASK_REPLY
Table 45 Legal NetBIOS Commands
MESSAGE:
REQUEST:
POSITIVE:
VE:
RETARGET:
KEEPALIVE:
- Prestige 2602HW Series 1
- Copyright 3
- Federal Communications 4
- Commission (FCC) Interference 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 13 14
- Chapter 14 14
- Chapter 15 15
- Chapter 16 15
- Chapter 17 16
- Chapter 18 16
- Chapter 37 21
- Chapter 38 21
- 26 Table of Contents 26
- List of Figures 27
- 34 List of Figures 34
- List of Tables 35
- 40 List of Tables 40
- About This User's Guide 41
- Related Documentation 41
- User Guide Feedback 41
- Syntax Conventions 42
- Introduction to DSL 43
- Introduction to ADSL 44
- CHAPTER 1 45
- PSTN Lifeline 46
- Dynamic Jitter Buffer 46
- VoIP Standards Compliance 46
- IEEE 802.11g Wireless LAN 49
- External Antenna 49
- WEP Encryption 49
- Wi-Fi Protected Access 49
- ADSL Standards 51
- Protocol Support 51
- IP Alias 51
- 1.4.1 Internet Access 53
- 1.4.4 LAN to LAN Application 55
- LED descriptions 56
- CHAPTER 2 57
- 2.1.2 Resetting the Prestige 58
- CHAPTER 3 63
- 3.1.2 Multiplexing 64
- 3.1.3 VPI and VCI 64
- Chapter 3 Wizard Setup 65 65
- 3.2.1 IP Address Assignment 66
- 3.2.3 NAT 67
- 68 Chapter 3 Wizard Setup 68
- Chapter 3 Wizard Setup 69 69
- 70 Chapter 3 Wizard Setup 70
- 3.2.5 SIP Identities 71
- 72 Chapter 3 Wizard Setup 72
- 3.2.7 DHCP Setup 73
- 74 Chapter 3 Wizard Setup 74
- Chapter 3 Wizard Setup 75 75
- 76 Chapter 3 Wizard Setup 76
- CHAPTER 4 77
- 78 Chapter 4 Password Setup 78
- CHAPTER 5 79
- 5.2 DNS Server Address 80
- 5.4 LAN TCP/IP 81
- 5.5 Any IP 82
- 5.5.1 How Any IP Works 83
- 5.6 Configuring LAN 84
- 5.7 Configuring Static DHCP 85
- 86 Chapter 5 LAN Setup 86
- Figure 21 LAN: Static DHCP 86
- Table 13 LAN: Static DHCP 86
- CHAPTER 6 87
- 6.1.4 RTS/CTS 88
- 6.2 Levels of Security 89
- 6.3 Data Encryption with WEP 90
- 6.4 Configuring Wireless LAN 90
- Figure 24 Wireless LAN 91
- Table 14 Wireless LAN 91
- 6.5 Configuring MAC Filter 92
- Table 15 MAC Address Filter 93
- 6.6 Network Authentication 94
- 6.7 Introduction to WPA 96
- LABEL DESCRIPTION 102
- 6.14 Configuring RADIUS 106
- Table 22 RADIUS 107
- CHAPTER 7 109
- 7.3 PPPoE Encapsulation 110
- 7.4 Traffic Shaping 110
- 7.6 Configuring WAN Setup 111
- 112 Chapter 7 WAN Setup 112
- Figure 36 WAN Setup (PPPoE) 112
- Table 23 WAN Setup 112
- Chapter 7 WAN Setup 113 113
- 7.7 Traffic Redirect 114
- 7.8 Configuring WAN Backup 115
- IP address here 116
- Check WAN IP Address 117
- 118 Chapter 7 WAN Setup 118
- CHAPTER 8 119
- 8.1.2 What NAT Does 120
- 8.1.3 How NAT Works 120
- 8.1.4 NAT Application 121
- 8.1.5 NAT Mapping Types 121
- Table 26 NAT Mapping Types 122
- 8.3 SUA Server 123
- 8.4 Selecting the NAT Mode 124
- 8.5 Configuring SUA Server 125
- CHAPTER 9 131
- 9.2.2 SIP Call Progression 132
- 9.2.3 SIP Servers 132
- 9.2.3.2 SIP Proxy Server 133
- 9.2.3.3 SIP Redirect Server 134
- 9.3 SIP ALG 135
- 9.4 Pulse Code Modulation 135
- 9.5 Voice Coding 136
- CHAPTER 10 137
- 138 Chapter 10 Voice Screens 138
- Table 33 SIP Settings 138
- Chapter 10 Voice Screens 139 139
- 10.4.1 Type Of Service (ToS) 140
- 10.5 QoS Configuration 141
- 10.6 Phone 142
- 10.7 Phone Configuration 143
- 10.8 Speed Dial 144
- Chapter 10 Voice Screens 145 145
- Figure 55 Speed Dial 145
- Table 37 Speed Dial 145
- 146 Chapter 10 Voice Screens 146
- Chapter 10 Voice Screens 147 147
- Figure 56 Lifeline 147
- Table 38 Lifeline 147
- 148 Chapter 10 Voice Screens 148
- Figure 57 Phone Port Common 148
- Table 39 Phone Port Common 148
- CHAPTER 11 149
- Figure 58 Dynamic DNS 150
- Table 40 Dynamic DNS 150
- CHAPTER 12 151
- 152 Chapter 12 Time and Date 152
- Figure 59 Time and Date 152
- Table 42 Time and Date 152
- Chapter 12 Time and Date 153 153
- 154 Chapter 12 Time and Date 154
- CHAPTER 13 155
- 156 Chapter 13 Firewalls 156
- 13.4 Denial of Service 157
- 13.4.2 Types of DoS Attacks 158
- Chapter 13 Firewalls 159 159
- Figure 62 SYN Flood 159
- 13.4.2.1 ICMP Vulnerability 160
- 13.5 Stateful Inspection 161
- 162 Chapter 13 Firewalls 162
- 13.5.3 TCP Security 163
- 13.5.4 UDP/ICMP Security 164
- 13.5.5 Upper Layer Protocols 164
- 13.6.1 Security In General 165
- 13.7.1 Packet Filtering: 166
- 13.7.2 Firewall 166
- Chapter 13 Firewalls 167 167
- 168 Chapter 13 Firewalls 168
- CHAPTER 14 169
- 14.3 Rule Logic Overview 170
- 14.3.3.1 Action 171
- 14.3.3.2 Service 171
- 14.3.3.3 Source Address 171
- 14.3.3.4 Destination Address 171
- 14.4.1 LAN to WAN Rules 172
- 14.4.2 WAN to LAN Rules 172
- 14.4.3 Alerts 173
- 14.6 Rule Summary 174
- Table 48 Rule Summary 175
- Address 178
- 14.7 Customized Services 179
- 14.9 Example Firewall Rule 180
- 14.10 Predefined Services 184
- 14.11 Anti-Probing 186
- 14.12 DOS Thresholds 187
- 14.12.1 Threshold Values 188
- 14.12.2 Half-Open Sessions 188
- CHAPTER 15 191
- CHAPTER 16 195
- 16.1.4 VPN Applications 196
- 16.2 IPSec Architecture 197
- 16.3 Encapsulation 197
- 16.4 IPSec and NAT 198
- Table 58 VPN and NAT 199
- CHAPTER 17 201
- 17.3 My IP Address 202
- 17.4 Secure Gateway Address 203
- 17.5 VPN Summary Screen 203
- 204 Chapter 17 VPN Screens 204
- Figure 86 VPN Summary 204
- Table 60 VPN Summary 204
- 17.6 Keep Alive 205
- 17.7 Remote DNS Server 205
- 17.8 NAT Traversal 206
- 17.9 ID Type and Content 207
- VPN tunnel 208
- 17.10 Pre-Shared Key 209
- 17.11 Editing VPN Policies 209
- 210 Chapter 17 VPN Screens 210
- Figure 89 VPN IKE 210
- Chapter 17 VPN Screens 211 211
- Table 65 VPN IKE 211
- 212 Chapter 17 VPN Screens 212
- Chapter 17 VPN Screens 213 213
- 17.12 IKE Phases 214
- Chapter 17 VPN Screens 215 215
- 17.12.1 Negotiation Mode 216
- Chapter 17 VPN Screens 217 217
- 218 Chapter 17 VPN Screens 218
- 17.14 Manual Key Setup 219
- 17.15 Configuring Manual Key 220
- Chapter 17 VPN Screens 221 221
- Table 67 VPN: Manual Key 221
- 222 Chapter 17 VPN Screens 222
- 17.16 Viewing SA Monitor 223
- 224 Chapter 17 VPN Screens 224
- Figure 93 VPN: SA Monitor 224
- Table 68 VPN: SA Monitor 224
- Chapter 17 VPN Screens 225 225
- 226 Chapter 17 VPN Screens 226
- Chapter 17 VPN Screens 227 227
- 228 Chapter 17 VPN Screens 228
- CHAPTER 18 229
- 18.2 Telnet 230
- 18.3 FTP 230
- 18.4 Web 231
- CHAPTER 19 233
- 19.2 UPnP and ZyXEL 234
- Table 73 Configuring UPnP 235
- Components selection box 236
- Figure 109 System Tray Icon 243
- Network 244
- CHAPTER 20 247
- 248 Chapter 20 Logs Screens 248
- Figure 114 Log Settings 248
- Chapter 20 Logs Screens 249 249
- Table 74 Log Settings 249
- 20.3 Displaying the Logs 250
- 20.4 SMTP Error Messages 250
- 20.4.1 Example E-mail Log 251
- 252 Chapter 20 Logs Screens 252
- CHAPTER 21 253
- 254 Chapter 21 Maintenance 254
- Figure 117 System Status 254
- Chapter 21 Maintenance 255 255
- Table 77 System Status 255
- 21.2.1 System Statistics 256
- 21.3 DHCP Table Screen 257
- 21.4 Any IP Table Screen 258
- 21.5 Wireless Screen 259
- 21.6 Diagnostic Screens 260
- 21.7 Firmware Screen 262
- Chapter 21 Maintenance 263 263
- Figure 126 Error Message 263
- 264 Chapter 21 Maintenance 264
- CHAPTER 22 265
- 22.2.2 Entering the Password 266
- 22.2.4 Entering Password 267
- Table 86 SMT Main Menu 268
- Table 87 Main Menu Summary 268
- 22.3.2 SMT Menus Overview 269
- 1234", and 271
- *” for each character 271
- CHAPTER 23 273
- CHAPTER 24 277
- Press ENTER to Confirm 279
- CHAPTER 25 281
- CHAPTER 26 285
- MAC address table 286
- CHAPTER 27 289
- 27.4 IP Alias Setup 290
- 27.5 Route IP Setup 291
- CHAPTER 28 295
- 28.4 Remote Node Filter 301
- 28.5.3 Advance Setup Options 303
- CHAPTER 29 305
- CHAPTER 30 309
- 310 Chapter 30 Bridging Setup 310
- 312 Chapter 30 Bridging Setup 312
- CHAPTER 31 313
- 31.3 NAT Setup 315
- Menu 15.1.255 is read-only 316
- 31.3.1.3 Ordering Your Rules 318
- 31.5 General NAT Examples 321
- Figure 174 NAT Example 2 322
- Figure 176 NAT Example 3 324
- Figure 181 NAT Example 4 326
- CHAPTER 32 329
- CHAPTER 33 331
- Filter Rule 332
- Filter Set 332
- Len Length 335
- 33.4.1 TCP/IP Filter Rule 336
- 33.4.2 Generic Filter Rule 338
- Length= 0 339
- 33.5 Filter Types and NAT 340
- 33.6 Example Filter 340
- Table 113 Filter Sets Table 342
- 33.7.1 Ethernet Traffic 343
- 33.7.2 Remote Node Filters 343
- CHAPTER 34 345
- 34.2 Supported MIBs 346
- 34.3 SNMP Configuration 346
- 34.4 SNMP Traps 347
- CHAPTER 35 349
- 35.1.3 IEEE802.1x 351
- CHAPTER 36 355
- 36.3 System Information 357
- 36.3.2 Console Port Speed 358
- 36.4 Log and Trace 359
- 36.4.2 Syslog and Accounting 360
- Figure 217 Syslog Example 361
- 36.5 Diagnostic 362
- CHAPTER 37 365
- 37.2 Backup Configuration 366
- 37.2.4 GUI-based FTP Clients 368
- 37.2.7 TFTP Command Example 369
- 37.3 Restore Configuration 371
- 37.4.1 Firmware File Upload 374
- 37.4.5 TFTP File Upload 376
- CHAPTER 38 381
- 38.2 Call Control Support 382
- 38.3 Time and Date Setting 383
- 38.3.1 Resetting the Time 384
- CHAPTER 39 387
- 39.4 System Timeout 389
- CHAPTER 40 391
- 40.4 IP Routing Policy Setup 392
- 40.5 Applying an IP Policy 395
- (192.168.1.100) 398
- CHAPTER 41 399
- CHAPTER 42 403
- 42.2 IPSec Summary Screen 404
- 42.3 IPSec Setup 406
- Menu 27.1.1 IPSec Setup 407
- 42.4 IKE Setup 410
- 42.5 Manual Setup 412
- CHAPTER 43 415
- 416 Chapter 43 SA Monitor 416
- Chapter 43 SA Monitor 417 417
- 418 Chapter 43 SA Monitor 418
- CHAPTER 44 419
- 44.10 Telephone Problems 423
- APPENDIX A 425
- APPENDIX B 429
- Installing Components 430
- Configuring 431
- Windows 2000/NT/XP 432
- Verifying Settings 436
- Macintosh OS 8/9 437
- Macintosh OS X 438
- APPENDIX C 441
- Subnet Masks 442
- Subnetting 442
- Example: Two Subnets 443
- Table 155 Subnet 1 444
- Table 156 Subnet 2 444
- Example: Four Subnets 445
- Example Eight Subnets 446
- APPENDIX D 449
- How PPPoE Works 450
- Prestige as a PPPoE Client 450
- APPENDIX E 451
- APPENDIX F 455
- APPENDIX G 457
- IEEE802.1x 458
- APPENDIX H 459
- IP Aliasing 460
- Gateways on the WAN Side 461
- APPENDIX I 463
- Command Examples 486
- APPENDIX J 489
- APPENDIX K 491
- APPENDIX L 493
- APPENDIX M 495
- Table 178 System Error Logs 496
- Table 180 TCP Reset Logs 497
- Table 182 ICMP Logs 497
- Table 183 CDR Logs 498
- Table 184 PPP Logs 498
- Table 185 UPnP Logs 499
- Table 187 Attack Logs 499
- Table 188 802.1X Logs 500
- Table 189 ACL Setting Notes 501
- Table 190 ICMP Notes 501
- Table 191 Syslog Logs 502
- Table 192 SIP Logs 502
- Log Commands 504
- Displaying Logs 505
- Log Command Example 506
- Numerics 507
- 508 Index 508
- Index 509 509
- 510 Index 510
- Index 511 511
- 512 Index 512
- Index 513 513
- 514 Index 514
- Index 515 515
- 516 Index 516
- Index 517 517
- 518 Index 518
- Index 519 519
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