viii Firmware User GuideLimited user configuration .................................. 10-4Advanced Security Options ........................................... 10-6RADIUS server authentication ............................. 10-7TACACS+ server authentication........................... 10-8Warning alerts ................................................... 10-9User access password ..................................... 10-12User menu differences..................................... 10-13Telnet Access ............................................................ 10-20About Filters and Filter Sets........................................ 10-21What’s a filter and what’s a filter set? ............... 10-21How filter sets work ......................................... 10-21How individual filters work ................................ 10-22Design guidelines ............................................ 10-27Working with IP Filters and Filter Sets .......................... 10-28Adding a filter set............................................. 10-29Deleting a filter set .......................................... 10-33A sample filter set............................................ 10-33Policy-based Routing using Filtersets........................... 10-36TOS field matching........................................... 10-37Firewall Tutorial ......................................................... 10-39General firewall terms ...................................... 10-39Basic IP packet components............................. 10-39Basic protocol types......................................... 10-39Firewall design rules ........................................ 10-40Filter basics..................................................... 10-42Example filters................................................. 10-43Configuration Management ......................................... 10-46TFTP ............................................................... 10-49Chapter 11 — Utilities and Diagnostics ...................................11-1Ping ............................................................................ 11-2Trace Route................................................................. 11-4Telnet Client ................................................................ 11-5
