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From: "Lenzi, Sergio" <lenzi@cwbone.bsi.com.br>
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Subject: Re: IP masquerading possible?
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> Is there a way to do IP masquerading under FreeBSD, so that I can 
> connect my network to the internet with only a single static IP 
> number?

Yes!, and works better, just use the package cached (is in the 
distfiles/ports/packages).
It is a proxy for ftp/http that works good under FreeBSD and Netscape.

I have several boxes using it.