Forum Discussion
CirrusAPM Active Directory error
Hi,
we have an AD which is an authentication source on APM and is working fine. Suddenly it stopped working giving these errors :
AD module: Couldn't get ldapHostName for IP address 10.11.131.20. Falling back to reverse DNS record dependency on DNS for AD.
AD module: query with '(sAMAccountName=mmahdy)' failed: Can't contact LDAP server (-1)
after a while, it works for somtimes and somtimes no !! any idea what could be the issue ?!
note : i have tested the access between the APM and the AD and it's working fine even in the time where the issue happened.
2 Replies
Seth_CooperEmployee
Have you had any issues with your DNS servers lately? You could always get a packet capture between the F5 and the AD/DNS servers and see if you can track down where the error might be.
-Seth
And here are some troubleshooting tips from support:
SOL11711: Error Message: Can't contact LDAP server - https://support.f5.com/kb/en-us/solutions/public/11000/700/sol11711.html?sr=51336875
SOL15906: Troubleshooting LDAP authentication for application traffic - https://support.f5.com/kb/en-us/solutions/public/15000/900/sol15906.html?sr=51336875
