Serwer wyjściowy zamraża

closing the shell session, e.g. with exit followed by 
Enter, or Ctrl-d usually allows you to exit the ssh 
session normally,
in the case where you have a bad connection and the 
shell is unresponsive, hit the Enter key, then type ~. 
and ssh should immediately close and return you to your
command prompt.
Precious Pheasant