They have clients and servers talking on UDP.
In a lan environment, the clients broadcast to port 27015, 27960, and
several others. If a server is nearby, he see's that broadcast and replies
to populate the clients server listing. Some game servers use a server
beacon instead, port 7777 (but all these are configurable keep in mind)
Clients and servers communicate using UDP in almost every case. (sometimes
initially using TCP)
Packets from clients are usually quite small, around 40-50 bytes each but
sent at a rate that is usually proportional to their rendering speed of
their client. Packets from servers are larger and usually talk to a fixed
client port (this too can be changed...)
If you want to know about the PROTOCOL used, there are some gaming sites
that post from coders at Id, Epic, and others... protocol.txt was one of the
docs they had that laid it all out...
Many games are now proxy aware and able to play thru proxy or nat devices.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Robert Olsson
Sent: Wednesday, March 14, 2001 2:45 AM
To: Firewalls mailinglist
Subject: Info on network games?
Anyone who knows of any good material or sites explaining network games?
How they work, what ports they use and so on...
Regards, Robert
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