LDAPS Connection Error - Unknown Hostname

[AnotherNOWDev]

I've been trying to connect with LDAPS without any luck.

Our current connection to LDAP works completely fine if we use the IP address with the following format ldap://192.158.1.38:389/

After we installed the certificate I'm facing the following error

Error Message ldaps://example01.server.corp:636 Unknown host example01.server.corp
Verify server address and port are correct and accessible

The certificate was issued with the following name values:

example01.server.corp
server.corp
SERVER

Why am I getting an error when connecting to LDAPS?

Note: I've changed the ip address and hostname values with samples for disclosure

[Tanushree Maiti]

Hi @AnotherNOWDev 

Ensure MID server is up which you have mentioned in the configuration.

Run the telnet command to the IP of the LDAP server and specify the port that is being used and test it.

like telnet hostname/ip 389

[Tanushree Maiti]

Check these post/ KB article if help you to debug:

https://www.servicenow.com/community/servicenow-ai-platform-forum/port-validation/m-p/1209155

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0517267

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0657528