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Contents vii
G
Allowing VPNs through a Firewall................................. 12-21
PPTP example.................................................. 12-23
ATMP example ................................................. 12-26
Chapter 13 — Security ...........................................................13-1
Suggested Security Measures....................................... 13-1
User Accounts ............................................................. 13-1
Telnet Access .............................................................. 13-3
About Filters and Filter Sets.......................................... 13-4
What’s a filter and what’s a filter set? ................. 13-4
How filter sets work ........................................... 13-4
How individual filters work .................................. 13-6
Design guidelines ............................................ 13-10
Working with IP Filters and Filter Sets.......................... 13-11
Adding a filter set............................................. 13-12
Viewing filter sets ............................................ 13-15
Modifying filter sets.......................................... 13-16
Deleting a filter set .......................................... 13-16
A sample IP filter set........................................ 13-16
Firewall Tutorial ......................................................... 13-19
General firewall terms ...................................... 13-19
Basic IP packet components............................. 13-20
Basic protocol types......................................... 13-20
Firewall design rules ........................................ 13-21
Filter basics..................................................... 13-23
Example filters................................................. 13-24
LAN IP Filtersets .............................................. 13-27
RADIUS Client Support............................................... 13-30
RADIUS client configuration .............................. 13-30
Warning alerts ................................................. 13-32
Chapter 14 — Monitoring Tools ...............................................14-1
Quick View Status Overview.......................................... 14-1
General status................................................... 14-2