Blocking Internet Gaming

James james at
Mon Jan 7 01:27:14 UTC 2002

They are specifiable on the server side.  And most server operators run
on default ports as it is easier to connect.  But you are right.  An
organization policy of no games is better.  

You could maybe also see if a tool like esniff (not free) or tcpdump
(free) would work to track people down.

- James

-----Original Message-----
From: owner-nanog at [mailto:owner-nanog at] On Behalf Of
Todd Suiter
Sent: Sunday, January 06, 2002 8:21 PM
To: James
Cc: 'Walter Gray'; nanog at
Subject: RE: Blocking Internet Gaming

Problem with that is you can spec those ports pretty much at will. This
came up
on the focus-ids at securityfocus list last week. Policy is a good place to
start. Make it obvious that your org does not approve of this type of
Then start looking at tcpdump output to find the ports/people, and go


On Sun, 6 Jan 2002, James wrote:

> What kind of games specifically?
> Like online Java games (Bejeweled)?  Or games like Quake, Unreal,
> etc?
> The latter is much easier, just block all traffic to/from the default
> ports which use them.  A quick google would yield what they use.  I'll
> give you a quick hint and say Quake3 is 29760-5 or so and Tribes1/2 is
> 28000-28005 or so.
> - James
> -----Original Message-----
> From: owner-nanog at [mailto:owner-nanog at] On Behalf
> Walter Gray
> Sent: Sunday, January 06, 2002 8:03 PM
> To: nanog at
> Subject: Blocking Internet Gaming
> Does anybody know of any good software or way to restrict Internet
> gaming on
> a corporate Network?

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