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    Zimbra Unable to start TLS: hostname verification failed when connecting to ldap master

    IT Discussion
    zimbra tls ldap ldaps
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    • S
      scottalanmiller @Dashrender
      last edited by

      @dashrender said in Zimbra Unable to start TLS: hostname verification failed when connecting to ldap master:

      @scottalanmiller said in Zimbra Unable to start TLS: hostname verification failed when connecting to ldap master:

      en connecting to ldap master." This can be pretty frustrating, especially as pretty much nothing online tells you what might b

      So this just happened during an upgrade?

      no

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      • S
        scottalanmiller @Dashrender
        last edited by

        @dashrender said in Zimbra Unable to start TLS: hostname verification failed when connecting to ldap master:

        Do I assume that it was in the manual that you needed to do this, and it was overlooked? or that the devs didn't bother to tell you, confirm that config during upgrade, etc?

        I don't know the source of the change. It happened during a cert renewal.

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        • D
          dbeato
          last edited by

          This is with your LDAP SSL not with the Host SSL Certificate correct?

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          • S
            scottalanmiller @dbeato
            last edited by

            @dbeato said in Zimbra Unable to start TLS: hostname verification failed when connecting to ldap master:

            This is with your LDAP SSL not with the Host SSL Certificate correct?

            In theory they should be the same.

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            • C
              condealisson
              last edited by

              Thank you so much scottalanmiller, saved me tonight after Letsencrypt certificate installation result in TLS error...

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              • S
                scottalanmiller @condealisson
                last edited by

                @condealisson said in Zimbra Unable to start TLS: hostname verification failed when connecting to ldap master:

                Thank you so much scottalanmiller, saved me tonight after Letsencrypt certificate installation result in TLS error...

                Glad that it helped you!

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                  ccelis5215 @scottalanmiller
                  last edited by

                  @scottalanmiller Thanks... That did the trick.

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                  • D
                    dbeato
                    last edited by

                    I am still trying to understand this issue, but it is probably due to having multiple Zimbra servers in a pool. Usually in one Zimbra Server setup that usually doesn't happen.

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                    • S
                      scottalanmiller @dbeato
                      last edited by

                      @dbeato said in Zimbra Unable to start TLS: hostname verification failed when connecting to ldap master:

                      I am still trying to understand this issue, but it is probably due to having multiple Zimbra servers in a pool. Usually in one Zimbra Server setup that usually doesn't happen.

                      No, we don't use a pool here.

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                      • G
                        GrantZimbra
                        last edited by

                        Had this error after installing a new commercial certificate. The error seems valid as my server hostname and certificate name do not match, but it is my understanding this name mismatch is allowed and should still work.

                        To resolve this I just ran these two commands as Zimbra user.
                        zmlocalconfig -e ldap_starttls_required=false
                        zmlocalconfig -e ldap_starttls_supported=0

                        I am slightly concerned as to the security implications of disabling these settings. I am still on ldap not ldaps and this is on CentOS 7.

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