Iptables and Connection Limits
Create connection limits for any users using a very basic
firewall
Auto provision clients in ZeroShell
There are hundreds of bash scripts in that folder. They
Cisco PIX Firewall Basics
Cisco PIX Firewall Basics
[http://www.netcraftsmen.net/resources/archived-articles/
Iptables and Cisco
Some basic rules to allow Cisco VPN clients through firewalls: