[1.1.30] Can't join server hosted by other players on standalone version

[bitsbytes]

When trying to join a multiplayer server hosted by someone else on their PC, the game tried connecting and then claimed "could not establish network communication with server". This only occurs on non-steam version when attempting to join servers hosted by players, and not on standalone servers. For standalone servers everything works as normal and servers are joinable.

Code: Select all

 76.380 Sprites loaded
  76.399 Generated mipmaps (4) for atlas [3] of size 16384x5568   
  76.410 Generated mipmaps (3) for atlas [4] of size 8192x4432   
  76.432 Generated mipmaps (3) for atlas [5] of size 16384x6064   
  76.443 Generated mipmaps (3) for atlas [6] of size 4096x3216   
  76.454 Generated mipmaps (3) for atlas [7] of size 4096x1856   
  76.503 Generated mipmaps (3) for atlas [8] of size 4096x3088   
  76.514 Generated mipmaps (5) for atlas [9] of size 8192x2240   
  76.526 Generated mipmaps (3) for atlas [12] of size 8192x2352   
  76.564 Custom mipmaps uploaded.
  78.559 Factorio initialised
  78.559 Discord overlay detected (DiscordHook64.dll)
  78.568 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-available-versions?username=BitsBytes&token=<private>&apiVersion=2
  79.237 Some core updates would be reachable if experimental updates were enabled.
  79.237 0 packages available to download (experimental updates disabled).
  89.006 Info UDPSocket.cpp:27: Opening socket at (IP ADDR:({0.0.0.0:0}))
  93.824 Info UDPSocket.cpp:218: Closing socket
  93.824 Info UDPSocket.cpp:248: Socket closed
  93.824 Info UDPSocket.cpp:218: Closing socket
  97.098 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-available-versions?username=BitsBytes&token=<private>&apiVersion=2
  97.243 Some core updates would be reachable if experimental updates were enabled.
  97.243 0 packages available to download (experimental updates disabled).
 105.684 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-available-versions?username=BitsBytes&token=<private>&apiVersion=2
 105.806 Some core updates would be reachable if experimental updates were enabled.
 105.806 0 packages available to download (experimental updates disabled).
 111.410 Info UDPSocket.cpp:27: Opening socket at (IP ADDR:({0.0.0.0:0}))
 211.892 Info UDPSocket.cpp:218: Closing socket
 211.892 Info UDPSocket.cpp:248: Socket closed
 211.892 Info UDPSocket.cpp:218: Closing socket
 214.859 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-available-versions?username=BitsBytes&token=<private>&apiVersion=2
 215.539 Some core updates would be reachable if experimental updates were enabled.
 215.539 0 packages available to download (experimental updates disabled).
 245.337 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-available-versions?username=BitsBytes&token=<private>&apiVersion=2
 245.454 3 packages available to download (experimental updates enabled).
 247.443 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-download?package=core-win64&from=1.1.27&to=1.1.28&isTarget=false&username=BitsBytes&token=<private>&apiVersion=2
 396.040 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-download?package=core-win64&from=1.1.28&to=1.1.29&isTarget=false&username=BitsBytes&token=<private>&apiVersion=2
 532.634 Info HttpSharedState.cpp:54: Downloading https://updater.factorio.com/updater/get-download?package=core-win64&from=1.1.29&to=1.1.30&isTarget=true&username=BitsBytes&token=<private>&apiVersion=2
 687.528 Quitting: user-quit.

[ptx0]

if not using Steam networking the person hosting must be able to hole-punch their NAT / firewall.