From owner-freebsd-isp  Thu Dec  2  9:35:22 1999
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From: Kevin Day <toasty@dragondata.com>
Message-Id: <199912021550.JAA28909@celery.dragondata.com>
Subject: Re: Chat Only???
To: aLan@fil.net (aLan Tait)
Date: Thu, 2 Dec 1999 09:50:36 -0600 (CST)
Cc: freebsd-isp@FreeBSD.ORG (freebsd-isp@FreeBSD.ORG)
In-Reply-To: <38468786.2A78E9EF@fil.net> from "aLan Tait" at Dec 02, 1999 10:51:50 PM
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> 
> My partner wants us to offer a "chat only" service (no http,
> ftp, email) and I think I can do it with a simple filter,
> but am having a bit of a time locating the filter info. 
> TCP/UDP and port info???  This is what I have...
> 
> IRC TCP ports 6659-6670 and 7000
> 
> ICQ UDP port 4000  (Any others?  No TCP?)
> 
> Freetel  Maybe TCP port 30000???
> 

You'll find ircd on all sorta ports, but yeah, you'll need to give them at
least ports 6659-6670. Also make sure that ircd can connect back to their
identd port.

This will prevent irc/icq users from transferring files between each other
though, since the clients negotiate random port numbers.

You know this really won't stop someone from using other services as well. I
could bind a socks proxy or PPP over TCP link to a port in that range, and
do whatever I wanted. :)


Kevin


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