When running the EPAgent httpSvcAvailability.pl plugin against an internal web server which has a self-signed SSL certificate one of these messages will be received:
HTTP Error Code=500, Message=Can't connect to ***.***.***.***:443
HTTP Error Code=500, Message=Can't connect to ***.***.***.***:443 (certificate verify failed)
SSL/HTTPS clients check the Subject Alternative Name specified in the certificate against the hostname, and report an error if they do not match. This is commonly the case with many automatically generated self-signed certificates, or when using a CNAME to reach the SSL host and the cert isn't generated with Subject Alternative Names.
To prevent the hostname certificate verification check add this line to the file EPAgent/epaplugins/lib/perl/Wily/HTTP.pm at the end of the "Globals" section and just before "Subroutines":
This will disable the hostname verification via the perl LWP (World-Wide Web library for Perl)