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Warning: Cannot open TCP port for simulation.

You are here: Home > Forum > General > General questions, comments, and issues > Warning: Cannot open TCP port for simulation.

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Warning: Cannot open TCP port for simulation. 01/09/2022 at 12:46 #147790
Intrini
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1 posts
Hi guys, I have followed the guide on how to set up a multiplayer server and done extensive research on why the ports are still closed.

I have created rules on both my routers settings and the windows firewall. I have even tried disabling the firewalls and I still get a closed connection.

Does anyone have any other suggestions I could try?

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Warning: Cannot open TCP port for simulation. 01/09/2022 at 19:02 #147796
Tomiexpress
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27 posts
maybe your provider is blocking ports permanently, ask on provider's support to open ports
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Warning: Cannot open TCP port for simulation. 01/09/2022 at 20:59 #147799
GeoffM
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6376 posts
Online
The message in the thread title relates to Windows specifically: SimSig has asked Windows to use the specified port and Windows said no. It's nothing to do with the firewall, router, or the provider at this point - though these could be an issue later. There are ways to try to work out what is using the chosen port, but it's probably easier just to find another port that is open. Anything from 1024 to 65535, broadly speaking.
SimSig Boss
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Warning: Cannot open TCP port for simulation. 01/09/2022 at 21:49 #147800
Albert
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1315 posts
If you are running Windows 11, please see this thread where a similar problem was posted: https://www.SimSig.co.uk/Forum/ThreadView/53418
AJP in games
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