SCIM Connector Testing

While I am able connect to my SCIM API Service hosted on a production-like cloud machine from Okta I am still unable to connect to my development machine. I get connect timed out. I can connect to my development machine without issue from any other device. What is it that I am missing? I suspect it is because of me using a self-signed certificate in my development server. Is there a way to establish trust between Okta and my development server in regards to SCIM Provisioning? This is the error I get when I click Test Connector Configuration.

Please review the form to correct the following errors:
Error authenticating: Connect to [redacted domain]:443 [[redacted domain]/[redacted ip]] failed: connect timed out
The connector configuration could not be tested. Make sure that the URL, Authentication Parameters are correct and that there is an implementation available at the URL provided.