I have problem connecting to host via ssh. It prompts me this error :
debianbox@debian:~$ssh firstname.lastname@example.org ssh_exchange_identification : Connection closed by remote host
The problem is that I used to connect to that machine before with the same account, but now I don't know what happen I just get this error. I try to warn the admin but he says that everything works fine. Can somebody tells me what is the problem?