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Make your CentOS 4 box acting as an Internet Gateway/Router using IP Masquerading | Open mind
What is IP Masquerading? IP Masquerade is a form of Network Address Translation or NAT which NAT allows internally connected computers that do not have one or more registered Internet IP addressesInstall Transparent Proxy and Content filtering in Debian Etch | Open mind
This guide will walk through the setup and installation of Debian GNU/Linux and Squid proxy. Optionally, DansGuardian may be used in addition to provide URL blacklisting andMastering IPTables, Part 2
Linux Journal Presents: Now with transcripts! This is part 2 of the IPTables tutorial series.Links:Part 1 video: Part 2: script, Part 2: the previous episode:Transcript, Part 1: script, Part ..An Introduction to Firewalling with iptables and pf By Shon Harris
Abstract In this article we assume the reader knows what a firewall is and other basic concepts about firewalls, like the distinction between stateless (static)