Zyxel-communications P-660H-T Series Uživatelský manuál Strana 152
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Hodnocené. / 5. Na základě hodnocení zákazníků
P-660H/HW-T Series User’ Guide
151 Chapter 11 Firewall Configuration
Whenever the number of half-open sessions with the same destination host address rises above
a threshold (TCP Maximum Incomplete), the Prestige starts deleting half-open sessions
according to one of the following methods:
• If the Blocking Time timeout is 0 (the default), then the Prestige deletes the oldest
existing half-open session for the host for every new connection request to the host. This
ensures that the number of half-open sessions to a given host will never exceed the
threshold.
• If the Blocking Time timeout is greater than 0, then the Prestige blocks all new
connection requests to the host giving the server time to handle the present connections.
The Prestige continues to block all new connection requests until the Blocking Time
expires.
11.12.3 Configuring Firewall Thresholds
The Prestige also sends alerts whenever TCP Maximum Incomplete is exceeded. The global
values specified for the threshold and timeout apply to all TCP connections.
Click Firewall, and Threshold to bring up the next screen.
Figure 63 Firewall: Threshold
The following table describes the labels in this screen.
- P-660H-T Series 1
- P-660HW-T 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
- 9 Customer Support 10
- Table of Contents 11
- Chapter 6 13
- Chapter 7 13
- Appendix M 24
- List of Figures 25
- 31 List of Figures 32
- List of Tables 33
- 37 List of Tables 38
- About This User's Guide 39
- Syntax Conventions 39
- Related Documentation 39
- User Guide Feedback 40
- Graphics Icons Key 40
- Introduction to DSL 41
- 41 Introduction to DSL 42
- CHAPTER 1 43
- 1.4 Front Panel LEDs 47
- 1.5 Hardware Connection 48
- CHAPTER 2 49
- 2.1.2 Resetting the Prestige 50
- 2.2 Change Login Password 53
- Table 4 Password 54
- CHAPTER 3 55
- CHAPTER 4 63
- 4.1.2 DHCP Setup 64
- 4.1.3 DNS Server Address 64
- 4.2 LAN TCP/IP 65
- 4.2.2 RIP Setup 66
- 4.2.3 Multicast 67
- 4.2.4 Any IP 67
- 4.2.4.1 How Any IP Works 68
- 4.3 Configuring LAN 69
- 69 Chapter 4 LAN Setup 70
- CHAPTER 5 71
- 5.2.3 Restricted Access 72
- 5.2.4 Hide Prestige Identity 72
- Chapter 5 Wireless LAN 72 73
- Figure 19 Wireless LAN 73
- Table 12 Wireless LAN 73
- 5.4.1 WEP Encryption 74
- Chapter 5 Wireless LAN 74 75
- Figure 21 Wireless Screen 75
- Table 13 Wireless LAN 75
- 75 Chapter 5 Wireless LAN 76
- This would lock you out 77
- 5.6 Introduction to WPA 78
- Chapter 5 Wireless LAN 78 79
- 79 Chapter 5 Wireless LAN 80
- Control field 81
- 81 Chapter 5 Wireless LAN 82
- Chapter 5 Wireless LAN 82 83
- 83 Chapter 5 Wireless LAN 84
- Chapter 5 Wireless LAN 84 85
- The screen appears as shown 86
- Chapter 5 Wireless LAN 86 87
- 5.9 Configuring RADIUS 88
- Chapter 5 Wireless LAN 88 89
- Table 20 RADIUS (continued) 89
- 89 Chapter 5 Wireless LAN 90
- CHAPTER 6 91
- 6.1.2 Multiplexing 92
- 6.1.3 VPI and VCI 92
- 6.1.4 IP Address Assignment 92
- 6.2 Metric 93
- 6.3 PPPoE Encapsulation 94
- 6.4 Traffic Shaping 94
- Chapter 6 WAN Setup 94 95
- 6.6 The Main WAN Screen 96
- 6.7 Configuring WAN Setup 96
- Chapter 6 WAN Setup 96 97
- Figure 34 WAN Setup (PPPoE) 97
- Table 22 WAN Setup 97
- 97 Chapter 6 WAN Setup 98
- 6.8 Traffic Redirect 99
- 6.9 Configuring WAN Backup 100
- Chapter 6 WAN Setup 100 101
- Figure 37 WAN Backup 101
- Table 23 WAN Backup 101
- Check WAN IP Address 102
- CHAPTER 7 103
- 7.1.2 What NAT Does 104
- 7.1.3 How NAT Works 104
- 7.1.4 NAT Application 105
- 7.1.5 NAT Mapping Types 106
- 7.3 SUA Server 107
- 7.4 Selecting the NAT Mode 108
- Figure 41 NAT Mode 109
- Table 27 NAT Mode 109
- LABEL DESCRIPTION 114
- CHAPTER 8 115
- Figure 45 Dynamic DNS 116
- Table 31 Dynamic DNS 116
- CHAPTER 9 117
- 117 Chapter 9 Time and Date 118
- Table 32 Time and Date 118
- CHAPTER 10 119
- 119 Chapter 10 Firewalls 120
- 10.4 Denial of Service 121
- 10.4.2 Types of DoS Attacks 122
- Chapter 10 Firewalls 122 123
- Figure 49 SYN Flood 123
- 10.4.2.1 ICMP Vulnerability 124
- 10.5 Stateful Inspection 125
- 125 Chapter 10 Firewalls 126
- 10.5.3 TCP Security 127
- 10.5.4 UDP/ICMP Security 128
- 10.5.5 Upper Layer Protocols 128
- 10.6.1 Security In General 129
- 10.7.1 Packet Filtering: 130
- 10.7.2 Firewall 130
- Chapter 10 Firewalls 130 131
- 131 Chapter 10 Firewalls 132
- CHAPTER 11 133
- 11.3 Rule Logic Overview 134
- 11.4 Connection Direction 135
- 11.4.2 Alerts 136
- 11.6 Rule Summary 137
- Table 38 Rule Summary 138
- Address 141
- 11.7 Customized Services 142
- 11.9 Example Firewall Rule 143
- 11.10 Predefined Services 147
- 11.11 Anti-Probing 149
- 11.12 DoS Thresholds 150
- 11.12.1 Threshold Values 151
- 11.12.2 Half-Open Sessions 151
- CHAPTER 12 155
- CHAPTER 13 159
- 13.2 Telnet 160
- 13.3 FTP 161
- 13.4 Web 161
- CHAPTER 14 163
- 14.2 UPnP and ZyXEL 164
- Table 50 Configuring UPnP 165
- Components selection box 166
- Figure 80 System Tray Icon 173
- Network 174
- CHAPTER 15 177
- 177 Chapter 15 Logs Screens 178
- Figure 85 Log Settings 178
- Table 51 Log Settings 178
- 15.3 Displaying the Logs 179
- 15.4 SMTP Error Messages 180
- 15.4.1 Example E-mail Log 181
- 181 Chapter 15 Logs Screens 182
- CHAPTER 16 183
- 16.5 Scheduler 186
- 16.7 Bandwidth Borrowing 188
- 16.9 Configuring Summary 189
- 16.11 Bandwidth Monitor 195
- CHAPTER 17 197
- 197 Chapter 17 Maintenance 198
- Figure 99 System Status 198
- Table 62 System Status 198
- 17.2.1 System Statistics 199
- 199 Chapter 17 Maintenance 200
- 17.3 DHCP Table Screen 201
- 17.4 Any IP Table Screen 202
- 17.5 Wireless Screen 202
- 17.6 Diagnostic Screens 203
- 203 Chapter 17 Maintenance 204
- 17.7 Firmware Upgrade 206
- Chapter 17 Maintenance 206 207
- Figure 108 Error Message 207
- 207 Chapter 17 Maintenance 208
- CHAPTER 18 209
- Figure 109 Login Screen 210
- Prestige 211
- ? > or 212
- 1234", and 213
- Table 73 Main Menu Summary 213
- *” for each character 214
- CHAPTER 19 215
- CHAPTER 20 219
- Press ENTER to Confirm 221
- CHAPTER 21 223
- CHAPTER 22 227
- MAC address table 228
- CHAPTER 23 231
- 23.4 IP Alias Setup 232
- 23.5 Route IP Setup 233
- Menu 4 Internet Access Setup 235
- CHAPTER 24 237
- 24.4 Remote Node Filter 243
- 24.5.3 Advance Setup Options 245
- CHAPTER 25 247
- CHAPTER 26 251
- 251 Chapter 26 Bridging Setup 252
- 253 Chapter 26 Bridging Setup 254
- CHAPTER 27 255
- 27.3 NAT Setup 257
- Menu 15.1.255 is read-only 258
- 27.3.1.3 Ordering Your Rules 260
- 27.5 General NAT Examples 262
- Figure 152 NAT Example 1 263
- Figure 154 NAT Example 2 264
- Figure 156 NAT Example 3 265
- Figure 161 NAT Example 4 268
- CHAPTER 28 271
- CHAPTER 29 273
- Len Length 277
- 29.4.1 TCP/IP Filter Rule 278
- 29.4.2 Generic Filter Rule 280
- Length= 0 281
- 29.5 Filter Types and NAT 282
- 29.6 Example Filter 282
- Table 98 Filter Sets Table 284
- 29.7.1 Ethernet Traffic 285
- 29.7.2 Remote Node Filters 285
- CHAPTER 30 287
- 30.2 Supported MIBs 288
- 30.3 SNMP Configuration 288
- 30.4 SNMP Traps 289
- CHAPTER 31 291
- 31.1.3 IEEE 802.1x 293
- CHAPTER 32 297
- 32.3 System Information 299
- 32.3.2 Console Port Speed 300
- 32.4 Log and Trace 301
- 32.4.2 Syslog and Accounting 302
- Figure 196 Syslog Example 303
- 32.5 Diagnostic 304
- CHAPTER 33 307
- 33.2 Backup Configuration 308
- 33.2.4 GUI-based FTP Clients 310
- 33.2.7 TFTP Command Example 311
- 33.3 Restore Configuration 312
- 33.4.1 Firmware File Upload 314
- 33.4.5 TFTP File Upload 316
- CHAPTER 34 319
- 34.2 Call Control Support 320
- 34.3 Time and Date Setting 321
- 34.3.1 Resetting the Time 323
- CHAPTER 35 325
- 35.4 System Timeout 327
- CHAPTER 36 329
- 36.4 IP Routing Policy Setup 330
- 36.5 Applying an IP Policy 333
- IP=0.0.0.0 336
- CHAPTER 37 339
- CHAPTER 38 343
- 38.3 Problems with the WAN 344
- Figure 224 Pop-up Blocker 346
- Figure 226 Internet Options 347
- 38.4.1.2 JavaScripts 348
- 3 Scroll down to Scripting 349
- 38.4.1.3 Java Permissions 350
- 38.4.1.3.1 JAVA (Sun) 351
- Figure 231 Java (Sun) 352
- 6 Then click the OK button 353
- Appendix A 355
- Product Specifications 355
- 355 Appendix A 356
- Table 123 Firmware 356
- Appendix A 356 357
- 357 Appendix A 358
- APPENDIX B 359
- 359 Appendix B 360
- Appendix C 361
- Installing Components 362
- Configuring 363
- Windows 2000/NT/XP 364
- Appendix C 364 365
- 365 Appendix C 366
- Appendix C 366 367
- 367 Appendix C 368
- Macintosh OS 8/9 369
- 369 Appendix C 370
- Macintosh OS X 371
- Verifying Settings 372
- Appendix C 372 373
- Using Configuration Files 374
- Appendix D 377
- IP Subnetting 377
- Subnet Masks 378
- Subnetting 378
- Example: Two Subnets 379
- 379 Appendix D 380
- Table 129 Subnet 1 380
- Table 130 Subnet 2 380
- Example: Four Subnets 381
- Example Eight Subnets 382
- Appendix D 382 383
- 383 Appendix D 384
- Appendix E 385
- Boot Commands 385
- 385 Appendix E 386
- Appendix F 387
- Command Interpreter 387
- 387 Appendix F 388
- Appendix G 389
- Firewall Commands 389
- 389 Appendix G 390
- Appendix G 390 391
- 391 Appendix G 392
- Appendix G 392 393
- 393 Appendix G 394
- Appendix H 395
- NetBIOS Filter Commands 395
- NetBIOS Filter Configuration 396
- Appendix H 396 397
- 397 Appendix H 398
- Appendix I 399
- Splitters and Microfilters 399
- Prestige With ISDN 400
- Appendix I 400 401
- 401 Appendix I 402
- Appendix J 403
- How PPPoE Works 404
- Prestige as a PPPoE Client 404
- Appendix K 405
- Wireless LANs 405
- 405 Appendix K 406
- Appendix K 406 407
- Fragmentation Threshold 408
- Preamble Type 409
- IEEE 802.1x 410
- Types of Authentication 411
- PEAP (Protected EAP) 412
- Dynamic WEP Key Exchange 412
- User Authentication 413
- Encryption 413
- Security Parameters Summary 414
- Appendix L 415
- Log Descriptions 415
- 415 Appendix L 416
- Table 144 System Error Logs 416
- Appendix L 416 417
- Table 146 TCP Reset Logs 417
- 417 Appendix L 418
- Table 148 ICMP Logs 418
- Table 149 CDR Logs 418
- Table 150 PPP Logs 418
- Appendix L 418 419
- Table 151 UPnP Logs 419
- 419 Appendix L 420
- Table 153 Attack Logs 420
- Appendix L 420 421
- Table 154 IPSec Logs 421
- Table 155 IKE Logs 421
- 421 Appendix L 422
- Appendix L 422 423
- 423 Appendix L 424
- Table 156 PKI Logs 424
- Appendix L 424 425
- 425 Appendix L 426
- Table 158 802.1X Logs 426
- Appendix L 426 427
- Table 159 ACL Setting Notes 427
- Table 160 ICMP Notes 427
- 427 Appendix L 428
- Table 161 Syslog Logs 428
- Log Commands 429
- Log Command Example 430
- APPENDIX M 431
- 433 Appendix M 434
- Appendix M 434 435
- 435 Appendix M 436
- Appendix M 436 437
- 437 Appendix M 438
- Appendix M 438 439
- 439 Appendix M 440
- Appendix M 440 441
- 441 Appendix M 442
- Appendix M 442 443
- 443 Appendix M 444
- Appendix M 444 445
- 445 Appendix M 446
- Appendix M 446 447
- 447 Appendix M 448
- Appendix M 448 449
- 449 Appendix M 450
- Appendix M 450 451
- 451 Appendix M 452
- Appendix M 452 453
- Command Examples 454
- Appendix M 454 455
- 455 Appendix M 456
- Numerics 457
- 457 Index 458
- Index 458 459
- 459 Index 460
- Index 460 461
- 461 Index 462
- Index 462 463
- 463 Index 464
- Index 464 465
- 465 Index 466
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