ip masqurading

[Gregory Nowak]

Hi All,

I've been reading the howto on ip masqurading, and setting it up as I go along.
However, I have kernel 2.4.5, but the howto doesn't cover
anything beyond 2.2.x. 
I do know that for that series it was possible
to use ip chains.
However, I also know that you can't use that with 2.4.x from what
I've read.
What do I use with 2.4.5, where do I get it from, and how do I configure it?
My distro is Slackware 7.1.
As always, thanks in advance for any help.
Greg