Hey there!
So my friend has a problem where he can't join my server, after restarting minecraft around 5 times, he does manage to get in, but most of the time he can't. He does have the correct ip as I made him even copypaste the IP adress. It just says "unknown host", he can join other servers tho. It's just that the problem occurs on my server.
Again, I don't know why it says "unknown host" if the IP is correct, I know that the IP is correct because 1/5 times he can manage to join.
Thanks,
Hudi!