iptables -> Could not establish connection to Steam servers.

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󠀡󠀡 ⁧⁧:3pacalypse :TheD 7 Jul, 2017 @ 8:07pm

Probably talked about a lot but I need to know what port and protocol steam needs to connect to VAC and do its thing. And also the same for the workshop. Steam lists some ports and have tried a variety of different combinations but, I have been unable to resolve the issue.

I can connect to the server fine, its just that the server isnt going VAC secure and connecting to steam.

Last edited by 󠀡󠀡 ⁧⁧:3pacalypse :TheD; 7 Jul, 2017 @ 8:08pm

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Showing 1-6 of 6 comments

Blaquicat 10 Jul, 2017 @ 6:27am

I supposed you are talking about SRCDS servers..

About iptables, theres no poing in blocking outgoing packets, only income, so on my l4d2 server the only port opened for income is the server port (25594 in my case, only UDP)..
I dont know about workshop collections, but it does connect to steam servers and the matchmaking system, everything works fine..

󠀡󠀡 ⁧⁧:3pacalypse :TheD 10 Jul, 2017 @ 9:13am

Originally posted by Blaquicat:
I supposed you are talking about SRCDS servers..

About iptables, theres no poing in blocking outgoing packets, only income, so on my l4d2 server the only port opened for income is the server port (25594 in my case, only UDP)..
I dont know about workshop collections, but it does connect to steam servers and the matchmaking system, everything works fine..

Thanks for the info. My server is for garrysmod so it uses 27015, didn't know L4D went that high. Anyway, I got UDP to accept 27015, no TCP as I don't use RCON. I just dunno what port srcds connects to steam servers/VAC with. When I was troubleshooting I noticed that when I accepted all on OUTPUT and restarted the server it would connect. But when I set it to DROP and restart it seems like the server is cached to be connected to the servers even with OUTPUT dropping. And takes a few restarts till it stops connecting which makes it hard to find what port is connecting. I might just OUTPUT a few ranges to try and narrow down the ports.

Blaquicat 10 Jul, 2017 @ 9:18am

I think its random, only the income port are fixed, just like any other client (of any kind or technology)
Why do you want to block output?

Sepp 10 Jul, 2017 @ 9:18am

According to the command line options the default port for VAC is 26900:
-sport <port> - Specifies the VAC port the server should use. Default is 26900.

I also agree with Blaquicat that blocking outgoing traffic doesn't make much sense.

Blaquicat 10 Jul, 2017 @ 9:43am

Originally posted by Sepp:
According to the command line options the default port for VAC is 26900:
-sport <port> - Specifies the VAC port the server should use. Default is 26900.

I also agree with Blaquicat that blocking outgoing traffic doesn't make much sense.

I think that is only for VAC1, GoldSRC based games..
https://developer.valvesoftware.com/wiki/Command_Line_Options#Source_Games
On the Source Games section you dont have that, only on the oldsrc games..