[0.16.51] Couldn't establish network communication with server

[notTheNsa]

Re-posted since my original post back in September 2018 was in the technical help section, and i'm still experiencing the issue

Good evening guys,

I am having the same issue over and over only with certain servers, i think it might be only servers hosted from other players and not the headless version but i'm not sure.
When I try to connect I get this error "Couldn't establish network communication with server". I will include the log in thethread but I think I have narrowed it down to this:

Code: Select all

1216.587 Warning TransmissionControlHelper.cpp:176: Fragment 0000 failed too many times
1217.438 Error ClientMultiplayerManager.cpp:95: MultiplayerManager failed: multiplayer.not-received-connection-accept-reply
1217.438 Info ClientMultiplayerManager.cpp:573: MapTick(4294967295) changing state from(Connecting) to(InitializationFailed)

Factorio version: 0.16.51
OS: MacOs & windows 10

Looking around on the forum, It seems that there are a few people, going back various versions of factorio, that have the same issue but there hasn't been a clear solution.

Some examples of the problem: https://www.reddit.com/r/factorio/comme ... h_network/

Does someone have a fix or is having the same problem?

[Rseding91]

Thanks for the report. The problem is: home routers suck. This is compounded by people being on public/business networks behind multiple levels of NAT.

At the moment I don't have any better answer. It *should* work if all of the hardware between the host and the person joining is working correctly but that's a *huge* "if".

In 0.17 we added steam networking support so if someone is hosting a game through steam and you're joining through steam it can relay through steams servers and "almost always works" since it bypasses all of the questionable hardware inbetween.

[GrumpyJoe]

about the Steam thing: last week i got some help from Factorio Discord.
It looks like my ISP has SNAT enabled (dynamic ports) which doesn´t let me host a game on my PC, at least not through the matching server , havn´t tried wo tell my friend to connect to my external IP.
Will the "Steam thing" bypass this as well?