dear Anurag
1. telnet is not working
2. connection properties are fine in the app as I am able to connect to payment agency when trying the same java code from my laptop
3. portal server is added in agency's firewall
4. network started a trace on the proxy server but could not see any log generated there means the request is not reaching till proxy server from the portal server. It means something is wrong at portal server
I am trying to reach payment gateway server over https protocol. I suspect that port 443 at portal server's firewall is not open. Hence I shall try to get that opened and try connecting again. Let me know if someone knows how to open portal server's firewall's port for https communications.
thank you !
seventyros
SAP EP