SSH can use a domain name but can not use a server name!

Something very strange happened to my server.

From home (where is also my server), I used ssh with my server name. From the outside, I ssh uses my domain name, which obviously points to my home server. However, since today, I can not use ssh on my server using the name of my server from my home.

I can not understand why, I did not make any changes. Does any body know what could be causing this problem?

I'm using mobaxterm to ssh if that helps. I also use pub / priv ssh key.


I'm trying to SSH using the name of my server, very rarely, it works, but most of the time, it is written "the host does not exist"

Thank you