Cannot login to UCS 4.1.3

Hi,

since today I cannot login to UCS 4.1.3 anymore. When connecting to the master I always get:

The connection to the Univention Management Console Server broke up unexpectedly.
If you have root permissions on the system you can restart UMC by executing the following commands:

  • invoke-rc.d univention-management-console-server restart
  • invoke-rc.d univention-management-console-web-server restart
    Otherwise please contact an administrator or try again later.

Restarting the services or the server doesn’t work.

Error: SSL error in _receive: [(‘SSL routines’, ‘ssl3_read_bytes’, ‘sslv3 alert certificate expired’), (‘SSL routines’, ‘ssl3_read_bytes’, ‘ssl handshake failure’)]. Probably the socket was closed by the client

Do you have any ideas?
Regards
Simon

Resolution:

Had to renew all certificates on the master, copy them to the other servers and restart services. The backup DC had a weird problem, had to rejoin it to the domain.

Yes, this was obvious.

BTW: Please update your system- UCS 4.1.x is outdated since years!

/Cv