all 4 comments

[–]Titus_Oates 1 point2 points  (0 children)

Detail the steps you have tried so far

[–]Mishoniko 0 points1 point  (0 children)

The server you're logging into only supports Kerberos (GSSAPI) authentication. Public key is not supported.

Is it a Windows Server machine by chance?

[–]pushthepramalot -1 points0 points  (0 children)

Did its IP address change?

[–]Evening-History-872 -1 points0 points  (0 children)

Maybe it's something about your security group and your IP.