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I can't get Remote Desktop to connect via any port other than 3389. I have two machines behind a router. The router supports NAT / port fowarding. Both machines have RDP listening on 3389.
Remote desktop works in either of the two below setups...
WANIP:3389 -> LANIP1:3389
And...
WANIP:3389 -> LANIP2:3389
However I want to be able to access both. When I change one external port to 3388...
WANIP:3389 -> LANIP1:3389
WANIP:3388 -> LANIP2:3389 <-- "Internal Error"
I can't connect to LANIP2. LANIP1 works fine. When I attempt to, RDP gives me an "Internal Error", which is different than the timeout that would occur if the port was not open. For some reason RDP will not work if the external port is different than the internal port, and I can't figure out why. Is this a windows feature?
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Does this answer your question? Can You Port Forward the Same Port # to 2 Different Internal IP Addresses?
– Tim_Stewart – 2020-02-27T19:23:21.863@Tim_Stewart I didn't quite understand your first comment. No, I'm not trying to forward the same port to 2 different machines. I'm trying to forward two separate external ports (3389 and 3388) to two separate LAN IPs, each on port 3389. But the 3388-3389 connection doesn't work. – The Shoe Shiner – 2020-02-27T23:27:46.113
Add your router make/model to the question, as this is most likely the limiting factor for that not working. Sorry if the first comment confused you. It was written from my phone. – Tim_Stewart – 2020-02-27T23:31:25.017