Linksys WRT320n dont allow external SSH access on port 443 when UPnP is enable

Linksys WRT320n dont allow external SSH access on port 443 when UPnP is enable.

My server is running OpenSSH server in my home network, I connect to that machine using the program Tunnelier.

My issues began a few weeks ago when i tried to connect to get SSH access to my server.
All that i got was a Timeout from Tunnelier Software.
I was able to connect to my server inside the network, so the server responded fine.
But i could not get external access to it.

My first thought was that there was something wrong with the portforwarding.
But everything looked fine, i then tried to change port to the default 22 and also tried port 4433.
Both worked fine with internal/external connections.

After a few hours of experimenting I found that if I disable UPnP in my linksys I was able to get external access.
Right now im running the linksys with the UPnP disabled.

So, some application must be blocking port 443 when using UPnP.
Investigation is still going on.

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