Hello Mohan
you can also check using JCMON in command line if the https service is correctly started:
- JCMON goto option 20
- select option as display ports
- check in the list whether you are getting any port for HTTPS , if you get it as 0, it mean you https service has not been started correctly
you may also have HTTPS related error in the default_trace files of your Portal that can pinpoint from where the problem is coming.
Location on your OS file system is: \usr\sap\<SID>\JC<InstNo>\j2ee\cluster\server<n>\log
Best regards,
Johann