Ok I just fired up this thing after 2 week or so break and I can't play for this very reason. Note that I do not have any sort of explicit firewall and this was not an issue before I had to stop playing.
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My connection (usa) is pc -> router -> internet
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What is annoying is that there is no pretty display of how we can resolve this issue (what ports it it is using or why NAt failed). If this was a linux game I would watch the socket activity (/proc/.../fd and netstat) but this being a windows game I'm clueless (I know zilch about microsoft system level stuff)
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I do have ?upnp? disabled on my router for security reasons as 99% of the routers have an exploit that allows a person external to your network to open the network up.
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normally I would just unplug the router and plug the internet connection directly into the computer but my provider (a well known usa cable provider) does crappy stuff with the mac address and it would require two service calls to change the mac address to/from the router.
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In case I did not say this above - I had absolutely no issues prior to this attempt to run the game (though it has been a while) so I believe something has changed in the game; the error message is ueseless for determing the network issue the game is having (or how to bypass the issue) and my home network has not changed in over a year.
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I was able to create a lobby and people were able to join...
I just can't join other people game
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Ok now I can join other people games; maybe it was just an issue with the games I tried to join earlier ?
Last edited by meme; 03/08/13 08:22 PM.