[solved][0.13.20]User Verification required

[Grey]

I will try to structure this as best as possible:
Lets start with:

Server Info

Online hosted root Server running a VM: 1 CPU, 6GB Ram, Debian (jessy)
Factorio headless 0.13.20, vanilla
no Settings file at all

As all Clients are unable to join there is no info in Hardware, Clients use steam Version, but even on "unzipped" clients the following happens:

Problem in short

Starting the Server Looks good to me, log is clean. If a Client joins it Fails with "unable to communicate with Server". Server writes following logs: (full logs attached)

Code: Select all

  14.060 Connection request(type(ConnectionRequest) applicationVersion(0.13.20 (build 24011, linux64, headless)) activeMods((base 0.13.20) ) hasPassword(no) connectionRequestID(12354)) from(10.0.2.2:59812)
  14.061 Refusing connection for address(10.0.2.2:59812). User verification is required for this game.
  14.567 Connection request(type(ConnectionRequest) applicationVersion(0.13.20 (build 24011, linux64, headless)) activeMods((base 0.13.20) ) hasPassword(no) connectionRequestID(12354)) from(10.0.2.2:59812)
  14.568 Refusing connection for address(10.0.2.2:59812). User verification is required for this game.
  15.091 Connection request(type(ConnectionRequest) applicationVersion(0.13.20 (build 24011, linux64, headless)) activeMods((base 0.13.20) ) hasPassword(no) connectionRequestID(12354)) from(10.0.2.2:59812)
  15.092 Refusing connection for address(10.0.2.2:59812). User verification is required for this game.

Long story

Server was started about a month ago with 0.13.18. with no config at all, only used "no commands" Option for starting. Updated to 0.13.19 and 0.13.20 without Problems. Never had any crashed or even lags. We were 2 Players online when Server started heavy lagging out of the sudden. after about 20 secs game totally froze. Screen session was not responding so no way to shutdown Server gently. Screen session was killed. We reloaded an autosave but joining was not possible with above mentioned Symptoms.

Unfortunately i cannot provide the logs of the "initial Crash", but thats not the matter. I built up Server from zip again, same with Client. Unable to join. When i remember correct on first join i was asked for the credentials (Name & pass) to my account. When i join now with fresh Client it only asks for username.

If other Information could be of use let me know, i try to provide. savegame is 24mb, not sure if Forum can handle.

[Grey]

With help of that awesome cracks of #Factorio i was able to work it out.

Solution for me was adding a server-Settings file. As documentation on this is quite poor i add it here and will also add on wiki once i find some minutes beneath playing...

I used the example Settings file "factorio/data/server-Settings-example.json" as base. Changed "visibility" to "hidden", for us its a community Server, and the "verify_user_identity" to "true". (full file attached)

last Thing to do is tell your Server to use the file by adding --server-Settings <File> to the commandline.
expl: bin/x64/factorio --Server-Settings server-Settings.json
(take care for permissions)

To the devs: Problem here was that Server was working fine "before Crash", afterwards its not working as before without the settingsfile. Not sure if Action is required here, but at least an hint would be nice.