Factorio Forums

Posted: **Thu Mar 24, 2016 6:20 pm**

This is networking stuff...

Description:
The game seems to exchange all the installed mods on connection request. It does this within the first UDP packet it sends.
It seems that when you activate too many mods, this packet gets fragmented and not always fully transmitted -> you can't connect, even to a server with matching modlist.

How to reproduce:
Activate more mods than fit into a single UDP packet and try to connect to any server.

Expected behaviour:
Connecting to a game with any amount of mods should work to any network.

Current behaviour:
Connecting to a game with too many (client side) mods causes a connection failure in specific configurations
(Couldn't establish network communication with server.)

Tested on
0.12.26 - 0.12.29
Win (64, p.forward on router), Linux (32&64, wan interface & open ports)

more details

even more details

modlist

Posted: **Tue Apr 05, 2016 1:59 pm**

Does it happen always, or just randomly?
As with fragmented packet, the probability that all of the parts are transfered is lower.

Posted: **Sun Apr 10, 2016 1:27 pm**

Yes, I can reproduce it every time.

I've narrowed it down to a firewall rule:

Works:

Code: Select all

iptables -A INPUT -p udp -m udp --dport 29000 -j ACCEPT

Doesn't work:

Code: Select all

iptables -A INPUT -p udp -m udp --dport 29000 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT

This works with any other service / game, and it works as long as the packets are valid.

Posted: **Sun Apr 17, 2016 8:58 am**

Well, it seems to work with the experimental alpha version 0.12.30.

The problem doesn't seem to appear anymore, so this issue can be closed.

Factorio Forums

[0.12.29] Can't connect with too many mods

[0.12.29] Can't connect with too many mods

Re: [0.12.29] Can't connect with too many mods

Re: [0.12.29] Can't connect with too many mods

Re: [0.12.29] Can't connect with too many mods