> > I am unable to figure out how instances #1 and #2 differ. > Instance #1 has long-established supplier-agreements (using both LDAPS and STARTTLS) with other instances of 389-Directory. So I know instance #1 can function correctly as a supplier. Instance #3 demonstrates it can be a consumer when supplied by instance #2. I can perform LDAPS and STARTTLS queries from a.state.ak.us to instance #3, so I know it is listening on the network and not blocked by a host-based firewall. > Any suggestions of where to look, or config-attributes to check, would be appreciated. The first check would be from on the host instance #1: openssl s_client -connect hostname-of-instance-two:636 -showcerts And assert that the connection proceeds and the certificate chain presented is as you expect. -- Sincerely, William Brown Senior Software Engineer, Identity and Access Management SUSE Labs, Australia _______________________________________________ 389-users mailing list -- 389-users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to 389-users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/389-users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue