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5.
The IRC server sends a return message to your router using the NAT-assigned source port (for example,
port 33333) as the destination port and sends an "identify" message to your router with destination port
113.
6.
When your router receives the incoming message to destination port 33333, it checks its session table
to see if a session is active for port number 33333. Finding an active session, the router restores the
original address information replaced by NAT and sends this reply message to your computer.
7.
When your router receives the incoming message to destination port 113, it checks its session table
and finds an active session for port 113 associated with your computer.The router replaces the message's
destination IP address with your computer's IP address and forwards the message to your computer.
8.
When you finish your chat session, your router eventually senses a period of inactivity in the
communications. The router then removes the session information from its session table and incoming
traffic is no longer accepted on port numbers 33333 or 113.
Manage and Customize Internet Traffic Rules for Ports
XR500 Nighthawk Pro Gaming Router
172
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