Zyxel-communications 202H Manual de usuario Pagina 173
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Prestige 202H User’s Guide
Creating Custom Rules 15-13
15.6.1 Configuring Timeout Values
The factors influencing choices for timeout values are the same as the factors influencing choices for
threshold values – see section 14.4.1. Click Timeout for either Local Network to Internet Set or Internet
to Local Network Set.
Figure 15-6 Timeout Screen
The following table describes the fields in this screen.
Table 15-5 Timeout Menu
FIELD DESCRIPTION DEFAULT
VALUE
TCP Timeout Values
Connection Timeout This is the length of time the Prestige waits for a TCP
session to reach the established state before dropping the
session.
30 seconds
FIN-Wait Timeout This is the length of time a TCP session remains open after
the firewall detects a FIN-exchange (indicating the end of
the TCP session).
60 seconds
- Prestige 202H 1
- Copyright 2
- Interference Statement 3
- Caution 4
- ZyXEL Limited Warranty 5
- Customer Support 6
- Table of Contents 7
- List of Figures 14
- List of Tables 21
- Preface 25
- Part I: 27
- Chapter 1 29
- 1.3.1 Internet Access 32
- 1.3.2 LAN-to-LAN Connection 33
- 1.3.3 Remote Access Server 34
- Chapter 2 37
- Hardware Installation 37
- 2.3 Turn On Your Router 39
- Chapter 3 41
- Introducing the SMT 41
- Enter Password : XXXX 42
- 3.5 SMT Menu Overview 44
- 3.7 Resetting the Prestige 46
- Chapter 4 49
- SMT Menu 1 General Setup 49
- 4.3 Dynamic DNS 50
- 4.4 Configuring Dynamic DNS 51
- Chapter 5 53
- ISDN Setup 53
- Switch Type 54
- Calling Line Indication 54
- PABX Outside Line Prefix 54
- Data Link Connection 55
- 5.3 NetCAPI 57
- 5.3.3 RVS-COM 58
- 5.3.4 Configuring NetCAPI 59
- 5-8 ISDN Setup 60
- Chapter 6 61
- Ethernet Setup 61
- 6.2.3 Private IP Addresses 63
- 6.2.4 RIP Setup 63
- 6.2.5 DHCP Configuration 64
- , as shown 65
- 6.4 IP Alias 66
- 6.5 IP Alias Setup 67
- 6-8 Ethernet Setup 68
- Chapter 7 69
- Internet Access Setup 69
- 7.2 Internet Access Setup 70
- Part II: 72
- Chapter 8 73
- Remote Node Configuration 73
- 8.4 PPP Multilink 78
- 8.5 Bandwidth on Demand 78
- 8.6 Editing PPP Options 79
- 8.7 LAN-to-LAN Application 81
- 8.9 Configuring Filter 86
- Chapter 9 89
- Static Route Setup 89
- Chapter 10 93
- Dial-in Setup 93
- Dial-in Setup 10-3 95
- 10-4 Dial-in Setup 96
- 10.4 Callback Overview 97
- 10.5 Dial-In User Setup 97
- Both and 103
- No respectively 103
- Both and Yes 103
- Required 105
- Chapter 11 107
- 11.1.2 What NAT Does 108
- 11.1.3 How NAT Works 108
- 11.1.4 NAT Application 109
- 11.1.5 NAT Mapping Types 110
- 11.2 Applying NAT 112
- 11.3 NAT Setup 113
- 11.3.1 Address Mapping Sets 114
- 11.3.3 Ordering Your Rules 116
- 11.5 General NAT Examples 121
- Part III: 130
- Chapter 12 131
- Firewalls 131
- 12.4 Denial of Service 133
- 12.4.2 Types of DoS Attacks 134
- 5 REDIRECT 136
- 13 TIMESTAMP_REQUEST 136
- 14 TIMESTAMP_REPLY 136
- 17 ADDRESS_MASK_REQUEST 136
- 18 ADDRESS_MASK_REPLY 136
- 12.5 Stateful Inspection 137
- 12.5.3 TCP Security 140
- 12.5.4 UDP/ICMP Security 140
- 12.5.5 Upper Layer Protocols 140
- 12.6.1 Security In General 141
- 12.7.1 Packet Filtering: 142
- 12.7.2 Firewall 143
- Chapter 13 145
- Prestige 202H User’s Guide 147
- Table 13-1 View Firewall Log 147
- Chapter 14 149
- Configurator 149
- 14.2 Enabling the Firewall 151
- 14.3 E-mail 151
- 14.3.1 Alerts 152
- Table 14-2 E-mail 153
- 14.3.2 SMTP Error Messages 154
- 14.3.3 Example E-mail Log 154
- 14.4 Attack Alert 155
- 14.4.2 Half-Open Sessions 156
- Table 14-4 Attack Alert 158
- Chapter 15 161
- Creating Custom Rules 161
- Service 162
- 15.3 Connection Direction 163
- 15.4 Rule Summary 164
- 15.5 Predefined Services 166
- 15.6 Timeout 172
- Chapter 16 175
- Customized Services 175
- 16.3 Example Firewall Rule 177
- 10.0.0.15 on the LAN 180
- Click Apply to save your 180
- Chapter 17 181
- Firewall Logs 181
- 17-2 Firewall Logs 182
- Table 17-1 Log Screen 182
- Part IV: 183
- Chapter 18 185
- Filter Configuration 185
- Built-in 186
- Call Filters 186
- Filter Rule 187
- Filter Set 187
- 18.3.1 TCP/IP Filter Rule 193
- 18.3.2 Generic Filter Rule 198
- 18.4 Filter Types and NAT 200
- 18.5 Example Filter 200
- 18.6.1 Ethernet Traffic 204
- 18.6.2 Remote Node Filters 204
- Chapter 19 207
- SNMP Configuration 207
- 19.2 Supported MIBs 208
- 19.3 SNMP Configuration 208
- 19.4 SNMP Traps 209
- Chapter 20 211
- 20.3.1 System Information 214
- 20.4 Log and Trace 215
- 20.4.2 Unix Syslog 216
- FIELD DESCRIPTION 218
- Firewall log 218
- 20.5 Accounting Server 219
- 20.6 Call Triggering Packet 220
- 20.7 Diagnostic 221
- Chapter 21 225
- Maintenance 225
- 21.2 Backup Configuration 226
- 21.2.1 Backup Configuration 227
- 21.2.4 GUI-based FTP Clients 228
- 21.2.7 TFTP Command Example 229
- 21.3 Restore Configuration 231
- 21.3.1 Restore Using FTP 232
- 21.4.1 Firmware File Upload 234
- 21.4.5 TFTP File Upload 237
- Choose the Xmodem protocol 239
- Then click Send 239
- Chapter 22 243
- SMT Menus 24.8 to 24.10 243
- 22.2 Call Control Support 244
- 22.2.2 Black List 245
- 22.2.3 Budget Management 246
- 22.2.4 Call History 247
- 22.3 Time and Date 248
- 22.3.1 Resetting the Time 250
- Chapter 23 251
- Call Scheduling 251
- 23.3 Applying Schedule Sets 253
- 23-4 Call Scheduling 254
- Chapter 24 255
- Remote Management 255
- 24.2 Telnet 256
- 24.3 FTP 256
- 24.4 Web 256
- DESCRIPTION 257
- Chapter 25 259
- Introduction to VPN/IPSec 259
- 25.1.4 VPN Applications 260
- 25.2 IPSec Architecture 261
- 25.2.1 IPSec Algorithms 262
- 25.2.2 Key Management 262
- 25.3 Encapsulation 263
- 25.4 IPSec and NAT 264
- Chapter 26 265
- VPN/IPSec Setup 265
- 26.2 IPSec Algorithms 266
- 26.3 My IP Address 267
- 26.4 Secure Gateway Address 267
- 26.5 IPSec Summary 268
- VPN/IPSec Setup 26-5 269
- 26-6 VPN/IPSec Setup 270
- VPN/IPSec Setup 26-7 271
- 26.6 Keep Alive 272
- 26.7 ID Type and Content 272
- 26.8 Pre-Shared Key 274
- 26.9 IPSec Setup 274
- 26-12 VPN/IPSec Setup 276
- VPN/IPSec Setup 26-13 277
- 192.168.1.35 277
- 26-14 VPN/IPSec Setup 278
- 26.10 IKE Phases 279
- 26.10.1 Negotiation Mode 281
- VPN/IPSec Setup 26-19 283
- 26.12 Manual Key Setup 284
- VPN/IPSec Setup 26-21 285
- Chapter 27 289
- SA Monitor 289
- 27-2 SA Monitor 290
- Chapter 28 291
- IPSec Log 291
- IPSec Log 28-3 293
- IPSec Log 28-5 295
- Part V: 296
- Appendix A 298
- Troubleshooting 298
- Problems With the ISDN Line 299
- Remote User Dial-in Problems 300
- Problems With the Password 300
- Appendix B 302
- Power Adapter Specifications 302
- Index I 306
- J Index 307
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