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I'm trying to play a multiplayer game with a friend (GOG username: Zidin), we both have the GOG version of Mount & Blade Warband.
When I host, the server does not appear on my friend's side, and vice-versa.

We clicked on "add to official server list", we both inserted the serial number, we can join other servers.

The game was added to the firewall exceptions.

Can anyone help, please? :)
This question / problem has been solved by DeMignonimage
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iddalai: ...
When you host a game, you need to check the box "Add to official server list" to make it visible and you have to have a port opened/forwarded to your PC for incoming traffic (afaik it's port 7240 for UDP traffic). Adding the game to your firewall won't necessarily open ports for external traffic, but only let you send from your PC and receive answers. Most routers use NAT and block incoming traffic that wasn't requested. You may have to go into your routers configuration (usually by typing its IP-address in your browser; try 192.168.0.1 or 192.168.1.1) and tell him to forward certain incoming packets (send to 7240 via UDP) to your PC's IP-address at the same port, instead of dropping them.
To get your PC's IP-address:
- press Ctrl+R to open the Run Dialog and type in cmd
- in the command shell type in ipconfig

I haven't tried it myself yet, but that's how I'd do it and I thought it's better than no help. If it doesn't work, make sure your PC's firewall lets the traffic in at 7240 and also do a web-search on the used port. I may be wrong with 7240 via UDP. It was the first info I found about port and protocol.
Post edited December 13, 2014 by DeMignon
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iddalai: ...
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DeMignon: When you host a game, you need to check the box "Add to official server list" to make it visible and you have to have a port opened/forwarded to your PC for incoming traffic (afaik it's port 7240 for UDP traffic). Adding the game to your firewall won't necessarily open ports for external traffic, but only let you send from your PC and receive answers. Most routers use NAT and block incoming traffic that wasn't requested. You may have to go into your routers configuration (usually by typing its IP-address in your browser; try 192.168.0.1 or 192.168.1.1) and tell him to forward certain incoming packets (send to 7240 via UDP) to your PC's IP-address at the same port, instead of dropping them.
To get your PC's IP-address:
- press Ctrl+R to open the Run Dialog and type in cmd
- in the command shell type in ipconfig

I haven't tried it myself yet, but that's how I'd do it and I thought it's better than no help. If it doesn't work, make sure your PC's firewall lets the traffic in at 7240 and also do a web-search on the used port. I may be wrong with 7240 via UDP. It was the first info I found about port and protocol.
DeMignon: Thanks a lot! Opening port 7240 for UDP worked and we managed to find our created games and play.

This answer should be added to the solutions, to help out other people who might be facing the same.

Thanks again! :)
avatar
iddalai: ...
avatar
DeMignon: When you host a game, you need to check the box "Add to official server list" to make it visible and you have to have a port opened/forwarded to your PC for incoming traffic (afaik it's port 7240 for UDP traffic). Adding the game to your firewall won't necessarily open ports for external traffic, but only let you send from your PC and receive answers. Most routers use NAT and block incoming traffic that wasn't requested. You may have to go into your routers configuration (usually by typing its IP-address in your browser; try 192.168.0.1 or 192.168.1.1) and tell him to forward certain incoming packets (send to 7240 via UDP) to your PC's IP-address at the same port, instead of dropping them.
To get your PC's IP-address:
- press Ctrl+R to open the Run Dialog and type in cmd
- in the command shell type in ipconfig
I haven't tried it myself yet, but that's how I'd do it and I thought it's better than no help. If it doesn't work, make sure your PC's firewall lets the traffic in at 7240 and also do a web-search on the used port. I may be wrong with 7240 via UDP. It was the first info I found about port and protocol.
Thanks! That worked :)
Great, you're welcome!
It's such a weird issue, it worked great when we did these steps, but the next day it didn't work again and after some hours I could host and my friend could access my server but I couldn't access his sever when he tried to host...

Strange.