With the Pega 8.6.1. LinuxLite VM from the CLSA Course, I noticed that Port 8443 is enabled for SSL. I was able to log into the User Portal using that port, despite getting a Cert warning from Chrome.
However, I run into a problem when I tried to test out OAuth2 for Service REST. I was able to call the Service REST from outside from VM using POSTMAN using the https URL on port 8443, I was not able to call the same Service REST from another application in the same VM.
I got the following error message:
Caught unhandled exception: java.lang.RuntimeException: javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target