Avaya Business Secure Router 222 Configuration - Basics Manuale Utente Pagina 162
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162 Chapter 10 Firewalls
NN47922-500
Figure 49 Smurf attack
• ICMP vulnerability
ICMP is an error reporting protocol that works in concert with IP. The following
ICMP types trigger an alert:
• Illegal Commands (NetBIOS and SMTP)
The only legal NetBIOS commands are shown in Table 36— all others are illegal.
Table 35 ICMP commands that trigger alerts
5 REDIRECT
13 TIMESTAMP_REQUEST
14 TIMESTAMP_REPLY
17 ADDRESS_MASK_REQUEST
18 ADDRESS_MASK_REPLY
Table 36 Legal NetBIOS commands
MESSAGE:
REQUEST:
POSITIVE:
NEGATIVE:
RETARGET:
KEEPALIVE:
- Business Secure Router 1
- Copyright © Nortel 2005–2006 2
- Trademarks 2
- Contents 3
- Chapter 2 4
- Chapter 3 5
- Chapter 4 5
- Chapter 5 6
- Chapter 6 6
- Chapter 13 10
- Chapter 14 11
- Chapter 18 13
- Chapter 22 15
- Appendix A 15
- Appendix B 16
- 28 Tables 28
- Before you begin 29
- Text conventions 29
- Related publications 30
- Hard copy technical manuals 30
- How to get Help 31
- 32 Preface 32
- Chapter 1 33
- Router 222 33
- Physical features 34
- Nonphysical features 35
- Firewall 36
- Dynamic DNS support 38
- IP Multicast 38
- IP Alias 38
- Central Network Management 38
- Traffic Redirect 39
- Port Forwarding 39
- Full network management 40
- Road Runner support 40
- Logging and tracing 40
- Embedded FTP and TFTP Servers 40
- Hardware Setup 42
- Introducing the WebGUI 43
- Figure 2 Login screen 44
- Figure 6 MAIN MENU Screen 48
- Figure 7 Contact Support 49
- Wizard setup 51
- Wizard setup: Screen 2 52
- Ethernet 53
- 54 Chapter 3 Wizard setup 54
- Chapter 3 Wizard setup 55 55
- Chapter 3 Wizard setup 57 57
- Wizard setup: Screen 3 58
- IP address and Subnet Mask 59
- DNS Server address assignment 60
- WAN MAC address 60
- Chapter 3 Wizard setup 61 61
- 62 Chapter 3 Wizard setup 62
- Figure 12 Wizard 3 62
- Table 7 Wizard 3 62
- Chapter 3 Wizard setup 63 63
- 64 Chapter 3 Wizard setup 64
- Basic Setup Complete 65
- 66 Chapter 3 Wizard setup 66
- User Notes 67
- Security 70
- Advanced Router Configuration 71
- 72 Chapter 4 User Notes 72
- Termination) 73
- Emulation) 73
- 74 Chapter 4 User Notes 74
- Chapter 4 User Notes 75 75
- 76 Chapter 4 User Notes 76
- System screens 77
- Configuring General Setup 78
- Chapter 5 System screens 79 79
- 80 Chapter 5 System screens 80
- Dynamic DNS 81
- Configuring Dynamic DNS 81
- 82 Chapter 5 System screens 82
- Figure 15 DDNS 82
- Table 9 DDNS 82
- Configuring Password 83
- 84 Chapter 5 System screens 84
- Figure 16 Password 84
- Table 10 Password 84
- Chapter 5 System screens 85 85
- Configuring Time and Date 86
- Chapter 5 System screens 87 87
- Figure 17 Time and Date 87
- 88 Chapter 5 System screens 88
- Table 12 Time and Date 88
- Chapter 5 System screens 89 89
- Configuring ALG 90
- Chapter 5 System screens 91 91
- Table 13 ALG 91
- 92 Chapter 5 System screens 92
- LAN screens 93
- LAN TCP/IP 94
- Multicast 95
- Configuring IP 96
- Chapter 6 LAN screens 97 97
- Table 14 LAN IP 97
- 98 Chapter 6 LAN screens 98
- Chapter 6 LAN screens 99 99
- Configuring Static DHCP 100
- Configuring IP Alias 101
- 102 Chapter 6 LAN screens 102
- NN47922-500 102
- Figure 21 IP Alias 102
- Table 16 IP Alias 102
- Chapter 6 LAN screens 103 103
- 104 Chapter 6 LAN screens 104
- Chapter 7 105
- WAN screens 105
- Configuring Route 106
- Configuring WAN ISP 107
- PPPoE Encapsulation 108
- Chapter 7 WAN screens 109 109
- PPTP Encapsulation 110
- Chapter 7 WAN screens 111 111
- Table 20 PPTP Encapsulation 111
- Service type 112
- Chapter 7 WAN screens 113 113
- Figure 26 RR Service type 113
- Table 21 RR Service Type 113
- Configuring WAN IP 114
- Chapter 7 WAN screens 115 115
- Figure 27 WAN: IP 115
- 116 Chapter 7 WAN screens 116
- Table 22 WAN: IP 116
- Chapter 7 WAN screens 117 117
- Configuring WAN MAC 118
- Traffic redirect 119
- Configuring Traffic Redirect 120
- Chapter 7 WAN screens 121 121
- Figure 31 Traffic Redirect 121
- Table 23 Traffic Redirect 121
- Configuring Dial Backup 122
- Chapter 7 WAN screens 123 123
- Figure 32 Dial Backup Setup 123
- 124 Chapter 7 WAN screens 124
- Table 24 Dial Backup Setup 124
- Chapter 7 WAN screens 125 125
- 126 Chapter 7 WAN screens 126
- Advanced Modem Setup 127
- 128 Chapter 7 WAN screens 128
- Figure 33 Advanced Setup 128
- Chapter 7 WAN screens 129 129
- Table 25 Advanced Setup 129
- 130 Chapter 7 WAN screens 130
- Chapter 8 131
- What NAT does 132
- How NAT works 133
- NAT application 134
- NAT mapping types 135
- Using NAT 136
- SUA Server 137
- Configuring SUA Server 139
- Figure 38 SUA/NAT setup 140
- Table 29 SUA/NAT setup 140
- Configuring Address Mapping 141
- Figure 39 Address Mapping 142
- Table 30 Address Mapping 142
- Trigger Port Forwarding 145
- Figure 42 Trigger Port 147
- Table 32 Trigger Port 148
- Chapter 9 149
- Static Route screens 149
- Configuring IP Static Route 150
- Configuring Route entry 152
- Chapter 10 155
- Firewalls 155
- Packet Filtering firewalls 156
- Application level firewalls 156
- Chapter 10 Firewalls 157 157
- Denial of Service 158
- Types of DoS attacks 159
- 160 Chapter 10 Firewalls 160
- Chapter 10 Firewalls 161 161
- Figure 48 SYN flood 161
- • ICMP vulnerability 162
- ICMP types trigger an alert: 162
- Stateful inspection 163
- Stateful inspection process 164
- Chapter 10 Firewalls 165 165
- TCP security 166
- UDP/ICMP security 167
- Upper layer protocols 167
- 168 Chapter 10 Firewalls 168
- Packet filtering vs. firewall 169
- When to use the firewall 170
- Chapter 11 171
- Firewall screens 171
- Rule logic overview 173
- Connection direction examples 174
- WAN to LAN rules 175
- LAN to WAN rules 175
- Configuring firewall 176
- Configuring firewall rules 180
- Configuring custom ports 184
- Example firewall rule 185
- Predefined services 188
- Configuring attack alert 192
- Figure 62 Attack alert 194
- Table 43 Attack alert 194
- Chapter 12 197
- Content filtering 197
- Configure Content Filtering 198
- Table 44 Content filter 199
- VPN screens overview 202
- Security Association 203
- Other terminology 203
- IPSec architecture 204
- IPSec algorithms 205
- 206 Chapter 13 VPN 206
- Key management 207
- Encapsulation 208
- IPSec and NAT 209
- Secure Gateway Address 210
- Summary screen 211
- 212 Chapter 13 VPN 212
- Figure 68 Summary 212
- IP Policies 212
- Chapter 13 VPN 213 213
- Table 49 Summary 213
- Keep Alive 214
- Nailed Up 214
- NAT Traversal 215
- Preshared key 216
- Chapter 13 VPN 217 217
- Configuring Advanced Setup 218
- Chapter 13 VPN 219 219
- ID Type and content 220
- ID type and content examples 221
- My IP Address 222
- Chapter 13 VPN 223 223
- 224 Chapter 13 VPN 224
- Chapter 13 VPN 225 225
- 226 Chapter 13 VPN 226
- Chapter 13 VPN 227 227
- 228 Chapter 13 VPN 228
- Chapter 13 VPN 229 229
- 230 Chapter 13 VPN 230
- Configuring an IP Policy 231
- 232 Chapter 13 VPN 232
- Chapter 13 VPN 233 233
- 234 Chapter 13 VPN 234
- Chapter 13 VPN 235 235
- Port forwarding server 236
- Chapter 13 VPN 237 237
- IKE phases 238
- Negotiation Mode 239
- Perfect Forward Secrecy (PFS) 240
- Chapter 13 VPN 241 241
- 242 Chapter 13 VPN 242
- Chapter 13 VPN 243 243
- SA Monitor 244
- Chapter 13 VPN 245 245
- Figure 77 VPN SA Monitor 245
- Table 60 VPN SA Monitor 245
- Global settings 246
- Chapter 13 VPN 247 247
- Table 61 VPN Global Setting 247
- VPN Client Termination 248
- Chapter 13 VPN 249 249
- 250 Chapter 13 VPN 250
- Chapter 13 VPN 251 251
- 252 Chapter 13 VPN 252
- Chapter 13 VPN 253 253
- 254 Chapter 13 VPN 254
- Chapter 13 VPN 255 255
- 256 Chapter 13 VPN 256
- Chapter 13 VPN 257 257
- 258 Chapter 13 VPN 258
- Chapter 13 VPN 259 259
- 260 Chapter 13 VPN 260
- Certificates 261
- Self-signed certificates 262
- Configuration summary 263
- My Certificates 263
- 264 Chapter 14 Certificates 264
- Figure 84 My Certificates 264
- Chapter 14 Certificates 265 265
- Table 66 My Certificates 265
- Certificate file formats 266
- Importing a certificate 267
- 268 Chapter 14 Certificates 268
- Creating a certificate 269
- 270 Chapter 14 Certificates 270
- Chapter 14 Certificates 271 271
- My Certificate details 272
- Chapter 14 Certificates 273 273
- 274 Chapter 14 Certificates 274
- Chapter 14 Certificates 275 275
- Trusted CAs 276
- Chapter 14 Certificates 277 277
- Figure 88 Trusted CAs 277
- Table 70 Trusted CAs 277
- 278 Chapter 14 Certificates 278
- Chapter 14 Certificates 279 279
- Figure 89 Trusted CA import 279
- Table 71 Trusted CA import 279
- 280 Chapter 14 Certificates 280
- Chapter 14 Certificates 281 281
- 282 Chapter 14 Certificates 282
- Table 72 Trusted CA details 282
- Chapter 14 Certificates 283 283
- Trusted remote hosts 284
- Chapter 14 Certificates 285 285
- 286 Chapter 14 Certificates 286
- Chapter 14 Certificates 287 287
- 288 Chapter 14 Certificates 288
- Chapter 14 Certificates 289 289
- 290 Chapter 14 Certificates 290
- Chapter 14 Certificates 291 291
- 292 Chapter 14 Certificates 292
- Directory servers 293
- Secure Router can access 294
- Chapter 14 Certificates 295 295
- 296 Chapter 14 Certificates 296
- Chapter 15 297
- Bandwidth management 297
- Bandwidth classes and filters 298
- FTP 64 Kb/s 64 Kb/s 299
- H.323 64 Kb/s 64 Kb/s 299
- SIP 64 Kb/s 64 Kb/s 299
- Configuring summary 300
- Configuring class setup 301
- Chapter 16 309
- IEEE 802.1x 309
- EAP Authentication overview 310
- Configuring 802.1X 311
- 312 Chapter 16 IEEE 802.1x 312
- Figure 105 802.1X 312
- Table 85 802.1X 312
- Chapter 16 IEEE 802.1x 313 313
- 314 Chapter 16 IEEE 802.1x 314
- Chapter 17 315
- Authentication server 315
- Edit Local User Database 317
- Current split networks 320
- Current split networks edit 321
- Configuring RADIUS 323
- Figure 110 RADIUS 324
- Table 90 RADIUS 324
- Remote management screens 327
- Remote management and NAT 328
- System timeout 328
- Introduction to HTTPS 329
- Configuring WWW 330
- Figure 112 WWW 331
- Table 91 WWW 331
- HTTPS example 332
- Logon screen 336
- Secure Router models 338
- SSH overview 341
- How SSH works 342
- Configuring SSH 343
- Figure 123 SSH 344
- Table 92 SSH 344
- Example 1: Microsoft Windows 345
- Example 2: Linux 346
- Secure FTP using SSH example 347
- Configuring TELNET 349
- Configuring FTP 350
- Configuring SNMP 351
- Supported MIBs 353
- SNMP Traps 353
- REMOTE MANAGEMENT: SNMP 354
- Configuring DNS 355
- Configuring Security 356
- Figure 134 Security 357
- Table 98 Security 357
- Chapter 19 359
- UPnP implementation 360
- Configuring UPnP 360
- Chapter 19 UPnP 361 361
- Figure 135 Configuring UPnP 361
- Table 99 Configuring UPnP 361
- Displaying UPnP port mapping 362
- Installing UPnP in Windows Me 363
- Installing UPnP in Windows XP 364
- Chapter 19 UPnP 365 365
- 366 Chapter 19 UPnP 366
- Chapter 19 UPnP 367 367
- 368 Chapter 19 UPnP 368
- Figure 145 Service settings 368
- WebGUI easy access 369
- Local Network 370
- WebGUI logon screen displays 370
- Chapter 20 371
- Logs Screens 371
- 372 Chapter 20 Logs Screens 372
- Figure 150 View Log 372
- Table 101 View Log 372
- Configuring Log settings 373
- 374 Chapter 20 Logs Screens 374
- Figure 151 Log settings 374
- Chapter 20 Logs Screens 375 375
- Table 102 Log settings 375
- Configuring Reports 376
- Chapter 20 Logs Screens 377 377
- Figure 152 Reports 377
- Viewing Web site hits 378
- Chapter 20 Logs Screens 379 379
- Viewing Protocol/Port 380
- Viewing LAN IP address 381
- 382 Chapter 20 Logs Screens 382
- Reports specifications 383
- 384 Chapter 20 Logs Screens 384
- Chapter 21 385
- Call scheduling screens 385
- Call scheduling 385
- Call scheduling edit 387
- Maintenance 391
- 392 Chapter 22 Maintenance 392
- Figure 159 System Status 392
- Table 110 System Status 392
- System statistics 393
- DHCP Table screen 394
- F/W Upload screen 395
- 396 Chapter 22 Maintenance 396
- Figure 162 Firmware upload 396
- Table 113 Firmware Upload 396
- Chapter 22 Maintenance 397 397
- Configuration screen 398
- Backup configuration 399
- Restore configuration 400
- Restart screen 401
- 402 Chapter 22 Maintenance 402
- Figure 170 Restart screen 402
- Troubleshooting 403
- Problems with the LAN LED 404
- Problems with Internet Access 405
- Problems with the password 406
- Problems with the WebGUI 407
- Permissions 408
- Figure 173 Internet options 410
- Internet Explorer JavaScript 411
- JAVA (Sun) 414
- Netscape Pop-up Blockers 415
- Allowing Pop-ups 416
- Figure 181 Popup Windows 417
- Figure 182 Popup Windows 418
- Figure 183 Allowed Sites 419
- Figure 184 Advanced 420
- Log Descriptions 423
- Table 128 Attack Logs 425
- Table 129 Access Logs 426
- Table 130 ACL Setting Notes 431
- Table 131 ICMP Notes 431
- VPN/IPSec Logs 432
- VPN Responder IPSec Log 433
- Table 136 PKI Logs 438
- Log Commands 442
- Displaying Logs 443
- Log Command Example 444
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