So, this one's a complex issue I figure. I moved my folder containing my Minecraft server to a USB stick and replaced Arch with CentOS on my server PC. The server worked perfectly fine on Arch, now it doesn't work anymore.
I can ping to the server in terminal and it works just fine, but minecraft just returns the error: "No route to host." I tried changing the port from 25566 to 25567 but that didn't work. I don't know what's happening at all or why it's happening, but I can't connect to my server at all. IPV4 is the same as it was before, can anyone help?