Resource for firewall info?

[Blindside]

I'm trying to learn all I can about network porting, securing against tunneling, and port restricting. Anyone know of a good info resource, website or book? Thanks, A Budding Admin

[AMD'er]

well heres something that will help you get on your way..its a list of all your ports and it will come in handy http://www.iss.net/security_center/advice/Exploits/Ports/