A certificate has expired on the local CDS LDAP replica which is preventing LIGO.ORG logins on some of the control room workstations (depending on when they were last rebooted, or last connected to the LDAP server). For now, if you cannot log in to a workstation with your personal login, use the controls account instead. I am looking at a workaround until the new certificate is issued, but that will take a while longer to roll out.
I have implemented a temporary workaround for opsws0-10 in the control room to allow LIGO.ORG logins, so they should work again. On any other systems, use the controls account if your login does not work until further notice. Access from offsite via lhocds.ligo-wa.caltech.edu is unaffected (but you will still need to keep in mind the above if using lhocds to access any internal CDS hosts).