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Thread: Multiple external LDAP servers for authentication - no failover

  1. #1
    Join Date
    Dec 2006
    Rep Power

    Exclamation Multiple external LDAP servers for authentication - no failover

    We've been running ZCS for serveral years now and have configured zimbra for external authentication pointing to three ldap servers (all replicas).

    However recently we had an issue where one of the replicas needed to be bounced and we lost complete access to zimbra for authentication (users would connect and connections would time out trying to authenticate). Upon getting the ldap server in question brought back online, we noticed that this server was the one listed first on the list of servers to do authentication.

    Clearly, there is no failover happening. What's the purpose then for having multiple ldap servers or is failover not working? Is there a timeout value somewhere that would make it the server use the next in line?


  2. #2
    Join Date
    Sep 2009
    Rep Power


    Have you heard back regarding this issue? I'm having the same problem in that we had our primary LDAP go out and the backup was just fine but everything stopped working.

    It could be a timeout issue perhaps whereas it should fail over for any request as soon as it does not get a proper response.

  3. #3
    Join Date
    Jul 2007
    Rep Power


    Just wanted to give this a bump to see if anyone had found a way to make this fail over faster? I had another incident where this working would have saved me a lot of grief.

  4. #4
    Join Date
    Jul 2011
    Rep Power


    Configure DNS record (round robin) for multiple ldap query.

    Zimbra can work with NSCD for caching ldap query.
    Last edited by; 10-13-2011 at 04:56 PM.
    # ZCS 7.1.3 SLES11 SP1

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