Setting up Linux to be a Masquerading Gateway or a Firewall

PLEASE UNDERSTAND WHAT YOU ARE DOING BEFORE YOU START THIS. SAVE YOUR EXISTING CONFIGURATION FILES BEFORE CHANGING THEM. Please read my disclaimer about such things.

In the event that I've incorrectly stated something here, please let me know. My E-mail address is below.

You have Linux running with your Cable or DSL ISP and need to have some connectivity for other machines at your place, but refuse to pay the $10/month for an extra IP address. This is where Linux pays for itself!

This document assumes (sic) that you know what's going on with networks and Linux. Additional documentation can be found in the Linux Kernel Source tree in the Documentation/Configure.help file.

There is one caveat:
   You may need to make modifications to your kernel. If you're not comfortable with this, you're probably better off not trying until you are.


If you need a "real" firewall or at least the best security Linux can offer you, try this document.

If you're not terribly concerned about security and only need to share a network connection, try this one.

Disclaimer

-Paul
kronenpj@netzero.net
Last modified: Sun Nov 4 8:41:06 EST 2000
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