LDAP Authentication SLOW!!

[IndyOz]

We utilize LDAP authentication via Microsoft Active Directory and recently we've been seeing an increasing lag in the time it takes to login not only our ServiceNow production instance, but non-production instances as well. Currently the lag is anywhere from 50-90 seconds.

We've looked at things on our end in regards to our public LDAP server and there has been an initial passover by ServiceNow support, but neither group is seeing the root cause.

Has anyone had a similar issue in their environment? If so, how did they troubleshoot or eliminate the issue?

Brian Osborne, PMP
ITIL Program Manager
KAR Auction Services, Inc.

[IndyOz]

We had been using IP addresses for our LDAP servers' URL. Service-Now confirmed the delays was being called by failed reverse DNS lookups timing out. Once we assigned fully qualified domain names (FQDN) to our LDAP IP addresses and utilized these new FQDNs in the Server URL field for our LDAP Server entries the login times went from 50+ seconds to 2-5 seconds.

[bianca_vaccarin]

Thanks for sharing!