Network Security Information: Firewalls  

Network Security Information: Firewalls
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Proxy instalation(paper)
About NT Proxy Server secure installing

Network design - firewalls(paper)
This part of the well-known book is about firewall basics

Placing Backdoors Through Firewalls(paper)
How to set it and how to protect from it.

Linux LAN & Internet Firewall Security FAQ(paper)
Practical advice.

Checkpoint's Firewall-1 problems description(paper)
This information is old and not correct. All question to

General Firewall White Paper(paper)
Nice description of common firewall functions

Firewalls and Internet security(report)
Good paper with theory and firewalls description. Network security policy example.

Firewalling and Proxy Server HOWTO(how-to)
For LINUX based PC

Keeping Your Site Comfortably Secure: An Introduction to Internet Firewalls(paper)
Sorry for some broken images in the English version

Services to be filtered(checklist)
CERT recommended