Message-Id: 202009040830
Time: from now on
Affected: gitlab user
Impact: Warning is displayed

Due to a configuration change in the SSH Server of GWDG Gitlab some SSH
Clients may show the following warning upon a connection attempt:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
SHA256:rdwDod03HKo1TJp1MRPJnrBhnYP7yzRHcMRJ9qU5ZRs.
Please contact your system administrator.
Add correct host key in /home/benutzername/.ssh/known_hosts to get rid
of this message.
Offending ECDSA key in /home/benutzername/.ssh/known_hosts:1234
RSA host key for gitlab.gwdg.de has changed and you have requested
strict checking.
Host key verification failed.

This is intentional and the key with the fingerprint
SHA256:rdwDod03HKo1TJp1MRPJnrBhnYP7yzRHcMRJ9qU5ZRs can be trusted.