Could not connect to master server FIX

[Dead Stag]

We are aware that this has been a problem for people, including myself. For some reason some anti-virus seems to block the game from accessing the internet. I use Norton internert security and it was doing this for me. By reinstalling my anti virus software I could then host a server. However you should also be able to choose to allow the game to access the internet on your anti-virus software and this too should allow you to host. This may not work for everyone but is definitely worth checking/ trying.

[BowieMoonen@ TTV]

im going to GiVe this A try Thanks

Update:
All is well Now able to Host a Sever ( AVG 2015 Win 7)
Thanks Dead Stag !

[Kill3rCat [1st FORECON]]

~~~ALTERNATIVE FIX~~~
For me and a friend of mine, the above did not fix our problem. We played co-op once on the night we both got the game fine, and when we tried to start a new game (requiring exit to main menu, and then new co-op game), the person joining (not the host) would be stuck on 'Starting client' and then 'Could not connect'.

The fix:
We found you could fix this simply by restarting your game. Exiting to main menu and then attempting to join a game would result in this issue appearing, however if all players (including the host, and anyone joining) fully restart their game (by exiting to desktop and starting the game again) your problem should be fixed. Also, you should make sure you're running Steam as admin for good measure.

Note:
If the above doesn't fix your problem, then MAKE SURE you're running Steam as admin, and also try validating files (right-click ---> properties ---> local files ---> verify integrity of game cache).

[Ɠմìɀãօ ✪]

I have the same problem. I try this solution.

[2ndhorseman]

Has anyone tried this fix, I'd like to know before I spend hours looking for a solution?

[br ☠ #bagpolanmota]

i can;t see any room in co-op join,i even can't host any game anymore,please help

[SauerKraut]

We have the same issue. My friend already can't join anymore when I invite him to a game while already playing. When we both are starting a lobby together (the black screen where you can invite friends) it works perfectly but as soon as we are saving and starting it again it doesn't work anymore.
What we've tried:
-- run Steam in admin mode
-- open port 27000 (UDP+TCP)
-- checked Firewall and anti-virus software
-- reinstalled TheForest
-- verified integrity of game cache

We will try reinstalling our anti virus software and if something happens I will write it here

EDIT: We both reinstalled our anti virus software but the bug still won't let us play

[br ☠ #bagpolanmota]

well the problem got solved for me with this new update, now it's the first time since i tried again to join a game, now the join section is full of rooms,before this i was only able to join a game by invite, or host a game
you can also try:
- there are videos on the internet with the master server fix
-reinstalling net framework
-redo connection to internet

[Face]

Me (hosting) and a few friends (joining) have had this issue for awhile seems after a save its hit or miss if it loads but after all players restart it seems fine if that doesnt work which sometimes it doesnt for me, try renaming the save file this has worked for us on a few occasions

[Cашка шляпик]

i cano t help soory

[DragonChaser]

i still cant host since 0.36... :(

[=Axton=]

Was this fix intended for the host or clients? As a client I coudln't connect to a public server today, and not only that the game hung up on the "Connecting" screen. ALT F4 is the only way to close at that point.

[VikingM1ke]

And this problem still remains, after 3 updates they have done Nothing about the problem with starting up Co-op and try to host a server...and getting "could not connect to Steam freakin' Master server"
Are the developers never going to take a look at that? Isn't it of any value to them, to get Multiplay to work? Or do they need to recruit someone that can help them fix the bugs?

[VikingM1ke]

Ok, after vaccuming internet for an answer to this topic's prblem, I have found an answer that actually worked! How to get rid of that annoying "cannot connect to steam master server"!

Forward Ports (27014-27050)TCP, (3478,4379-4380) It's that simple if you know it, otherwise that info doesn't stair you in the face. This solution works for me and my router (Ping Communications) and if it doesn't work out for you, look up The Forest settings for YOUR router on this address: http://portforward.com/english/routers/port_forwarding/default.htm#P
All routers are listed there, I believe. Choose your router on the list, look up The Forest in the next list and Voi'la!

[DragonChaser]

Originally posted by Mel Function:

Ok, after vaccuming internet for an answer to this topic's prblem, I have found an answer that actually worked! How to get rid of that annoying "cannot connect to steam master server"!

Forward Ports (27014-27050)TCP, (3478,4379-4380) It's that simple if you know it, otherwise that info doesn't stair you in the face. This solution works for me and my router (Ping Communications) and if it doesn't work out for you, look up The Forest settings for YOUR router on this address: http://portforward.com/english/routers/port_forwarding/default.htm#P
All routers are listed there, I believe. Choose your router on the list, look up The Forest in the next list and Voi'la!

its not exactly my problem but tnx for sharing, ill try this, i just want to be able to host again :/. It is being worked on (confirmed), but i cant wait :D.

[SauerKraut]

Originally posted by Mel Function:

Ok, after vaccuming internet for an answer to this topic's prblem, I have found an answer that actually worked! How to get rid of that annoying "cannot connect to steam master server"!

Forward Ports (27014-27050)TCP, (3478,4379-4380) It's that simple if you know it, otherwise that info doesn't stair you in the face. This solution works for me and my router (Ping Communications) and if it doesn't work out for you, look up The Forest settings for YOUR router on this address: http://portforward.com/english/routers/port_forwarding/default.htm#P
All routers are listed there, I believe. Choose your router on the list, look up The Forest in the next list and Voi'la!

We tried that solution now and followed it step by step with our own routers and still no changes. But at least thank you for sharing it with us!