Here's a little more info on our little conundrum: Only normal users who have ssh keys configured can log on. Password authentication does not work at all when the LDAP server is down. sudo commands do not work at all, they simply hang. I can't even CTRL-C to cancel the sudo command after running it. The moment I start up the LDAP server again all these problems go away, and we are able to log on either with LDAP credentials or as a normal, local user. The problem is obviously somewhere on the client side of things, but where? Does anyone else out there use CentOS5 with LDAP for authentication? I can't imagine that my situation is unique.
