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Date:      Fri, 02 Nov 2001 21:21:05 -0500
From:      Allen Landsidel <all@biosys.net>
To:        Andreas Ntaflos <ntaflos.andreas@gmx.net>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: ICQ and NAT again.. :(
Message-ID:  <5.1.0.14.0.20011102210953.00ae4528@rfnj.org>
In-Reply-To: <20011103023357.A1564@Deadcell.ANT>

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At 02:33 AM 11/3/2001 +0100, you wrote:

>To have ICQ work well behind a firewall, you need to redirect a range
>of ports to the machine you have the ICQ client running. AFAIK, you need
>a different range of ports for each machine behind the NAT box.

I would just like to clarify something here.

This is no longer true for the current versions of ICQ.  If you are using 
an old version or a "clone" it may be true.

Currently, ICQ needs only the following :
(from http://www.icq.com/icqtour/firewall/netadmin.html -- just scroll down 
to the part where it says "In the event you cannot open any TCP listening port)

To be able to open a TCP connection to port 5190 on login.icq.com

After that, it needs nothing.  Configure it to use no listening ports, and 
it will use none and work just fine by transferring messages through the 
server.

I am currently using ICQ on my windows box, behind a FreeBSD 
firewall.  While I am not behind NAT, I allow no incoming traffic to this 
box except for those my box has created going out; it works fine.

I won't address the rest of the message because it doesn't appear that you 
are using the latest version of ICQ, and it is quite possible that you are 
using a clone instead.. so a reasonable person would see three options here:

#1 : If you are using ICQ, upgrade to the latest version.
#2 : If you are using a clone, upgrade to the latest version.
   2a: If there is not a new version of the clone available that uses the 
new protocol, pester the developer to get up to speed.


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