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Old 05-03-2006, 05:52 PM   #1
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Remote Desktop Port Numbers

I have been searching on and off for several weeks trying to figure out what port number tsclient or rdesktop uses. Basically, I'm trying to remote into my home machine from work but I have all incoming ports NAT'd except for one being forwarded. So I either want to figure out that port number and turn forwarding on for it or I want to tell rdesktop, etc. which port to use. Does anyone know how to get around this problem otherwise? Thanks for your help!

Old 05-03-2006, 06:34 PM   #2
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Quick search on google pointed to me two these sites.

Just have to make sure if there is a firewall on Windows that it is open also.

Old 05-03-2006, 07:23 PM   #3
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If you want to accept incoming requests at home, then you need to forward the port (3389) for udp and tcp.

NAT works by matching an incoming response to the outgoing request that it recorded. When you initiate the session from work, there is nothing to match with.
Old 05-04-2006, 09:40 AM   #4
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Wow! Thanks for the quick response time. I will forward 3389 tonight and let you know how it goes. Thanks again!

Old 05-04-2006, 12:09 PM   #5
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IANA maintains a comprehensive list of registered port numbers..

rdesktop uses the msrdp protocol so you would simply search this doc for msrpd it is also called ms-wbt-server (I have no idea why they changed the name.. **sigh**

but either way the list will come in handy in teh future when you need to identify port numbers...
Old 05-04-2006, 01:05 PM   #6
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You can always use tcpdump to see what port numbers are being used, assuming you have root access.


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