The following scenario: I have a Minecraft Forge server (LOTR Mod) for the 1.7.10. I run the server over my wireless router (so we don't need a Hamachi). With the appropriate IP, a friend of mine was able to join the server without any problems.
After we had played for about 30 minutes, he went out briefly to change his language to German. Since this disconnect, he could no longer access the server. His game simply can't find the server anymore. Neither I nor he changed anything. I restarted the server several times (and he restarted his game). He even reset the language setting. But nothing has happened. The server is suddenly no longer found. How is this possible and how can we fix it?
Your IP address may have changed.
I've already checked. According to "myip.is" it is the same one I sent him earlier.
For me it is sometimes a problem that I have the firewall for private networks on. At least not with servers but with LAN worlds, when that is on my brother never gets it.
We have already checked. Both for me and for him, all checkmarks for firewall communication are activated in Java.
