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Date:      Mon, 2 Feb 2004 17:28:06 +0100
From:      jan.muenther@nruns.com
To:        JJB <Barbish3@adelphia.net>
Cc:        questions@freebsd.org
Subject:   Re: proxies and firewalls
Message-ID:  <20040202162806.GA1639@ergo.nruns.com>
In-Reply-To: <MIEPLLIBMLEEABPDBIEGKEJDFHAA.Barbish3@adelphia.net>
References:  <200402021104.08570.jorn@wcborstel.nl> <MIEPLLIBMLEEABPDBIEGKEJDFHAA.Barbish3@adelphia.net>

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> Are you saying you know of an proxy server that does the nat
> function?

Actually, the point of having  proxies is *not* having
to route. Your proxy machine should not be able to forward packets. 

Roughly, there a two different sub-groups: Circuit layer and application
layer proxies, names should be self explaining. 

Example for an app layer gateway:

Port:   fwtk-2.1
Path:   /usr/ports/security/fwtk
Info:   A toolkit used for building firewalls based on proxy services


Example for a circuit level proxy:

Port:   nylon-1.2
Path:   /usr/ports/net/nylon
Info:   A Unix SOCKS 4 and 5 proxy server


Socks5 is already app layer, too, IIRC.

Cheers, J.




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