Using MonMotha's firewall script to build safe Internet sharing with Debian GNU/Linux: HOWTO Version

    Date09 Jul 2002
    CategoryFirewalls
    13396
    Posted ByAnthony Pell
    John Gowin wrote in about using IP masquerading and Debian to build a simple firewall. "This tutorial will give you the necessary steps to turn one of your old PCs into a firewall with IP Masquerading, using a popular Linux distribution. I will leave it to you to get and install Debian onto your machine and work out connectivity to your ISP, then I will guide you through a kernel compile and install. . . John Gowin wrote in about using IP masquerading and Debian to build a simple firewall. "This tutorial will give you the necessary steps to turn one of your old PCs into a firewall with IP Masquerading, using a popular Linux distribution. I will leave it to you to get and install Debian onto your machine and work out connectivity to your ISP, then I will guide you through a kernel compile and install - which is necessary to enable features in the 2.4.x series kernels which allow your Linux machine to act as a firewall.

    IP Masquerading is a type of network address translation (NAT) in the Linux kernel which allows packets (chunks of formatted data) from an internal machine to appear to be coming from the public interface of the firewall. This allows machines on the local network to assume the address of the firewall when communicating on the internet, thereby making them "hidden" from attackers."

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