Building Your Firewall Rulebase – One of the largest risks with a firewall is a misconfigured rulebase. The most expenseive firewall in the world does not help you if you have a rule misconfigured. “Building Your Firewall Rulebase” helps to address this problem. The paper focuses on the concepts of how to build a secure rulebase. It goes step by step through the design process, explaining each rule and it signifigance. The paper is focused for beginner/intermediate firewall admins, but even the gurus can hopefully learn a trick or two (I know I did).
You can download it from the following link: https://packetstormsecurity.com/files/download/11207/rules.html
Source: https://packetstormsecurity.com/files/11207/rules.html.html