Rseding91 wrote: Mon Apr 28, 2025 12:35 am That means your ISP has put you behind some form of NAT, and because of that, people won’t be able to connect to your server (as you’ve found out). You’ll have to contact your ISP about it since there’s nothing Factorio can do about it.

thank you very much
I will contact my ISP

the previous log

1.360 Info AuthServerConnector.cpp:110: Obtained serverPadlock for serverHash (Cu7cT3nnvAX4gBnNCYwXjUzFYPO0ePoT) from the auth server.
1.360 Info ServerMultiplayerManager.cpp:808: updateTick(45514) changing state from(CreatingGame) to(InGame)
1.428 Info ServerRouter.cpp:668 ...

I need two servers and I have just one public ip.
So I tried srv DNS.
It half works.

I can connect the server directly by subdomain.
But I cannot connect the server from lobby.

Should I set some something like
"public_address": "factorio.example.com:34198",
or add a key value
"port": 34198,
in ...