User`s manual

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11.7.1 Main Mode Remote Access....................................................................118
11.7.2 Aggressive Mode Remote Access.........................................................120
12 System Management...........................123
12.1 Configure System Services...............................................................................123
12.2 Change the Login Password.............................................................................124
12.3 Modify System Information................................................................................124
12.4 Setup Date and Time.........................................................................................125
12.4.1 View the System Date and Time............................................................126
12.5 System Configuration Management.................................................................126
12.5.1 Reset System Configuration...................................................................126
12.5.2 Backup System Configuration................................................................127
12.5.3 Restore System Configuration................................................................127
12.6 Upgrade Firmware..............................................................................................128
12.7 Reset the Internet Security Router....................................................................129
12.8 Logout Configuration Manager..........................................................................130
13 ALG Configuration................................131
14 IP Addresses, Network Masks, and
Subnets................................................135
14.1 IP Addresses......................................................................................................135
14.1.1 Structure of an IP address.......................................................................135
14.2 Network classes.................................................................................................135
14.3 Subnet masks.....................................................................................................136
15 Troubleshooting....................................139
15.1 Diagnosing Problem using IP Utilities...............................................................140
15.1.1 ping...........................................................................................................140
15.1.2 nslookup...................................................................................................141
16 Glossary...............................................143