Authentication for ligo.org accounts in the control room started to fail at about 1:40PM (or at least that was when it was first reported).  I followed it as far as cdsldap0 logs stating slapd couldn't contact the remote server; rock.ligo-wa.caltech.edu was not pingable.  So I called Jonathan and he was able to walk me through reconfiguring slapd to use the alternate server, quartz.ligo-wa.caltech.edu which is still up and reachable.  ligo.org logins should now be functional in the control room again - Jonathan will investigate further remotely later in the day.