Ports used by Diablo 2

Here are the ports used by Diablo 2.  This information is relevant when configuring a firewall, router or QoS.

TCP Ports 6112 and 4000.

If using this information for QOS priority by ports, I recommend setting both ports to highest priority.  For more information about using these ports to improve Diablo 2’s network performance, please see this article.

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