The IRIS LDAP servers (ldap.eecs.berkeley.edu) provide usernames and passwords for many EECS applications and servers. On Monday, April 29th at 6pm, we will be upgrading these servers and their related load balancers to Red Hat 8. We plan to gracefully fail the old servers over to the new with no loss of service. As part of this upgrade, new SSL certificates have also been installed. Those accessing our servers programmatically might notice the certificate upgrade, but most users should not see any changes.
Update April 29 6:20pm: The server switchover has been completed. The only issue so far was with a server that was trying to use an older security protocol, TLS 1.1. The new servers require a minimum of TLS 1.2. Please check this setting if you are having problems.