How to forward logs of a specific source to a third-party, non-Splunk system using a certificate?

Hello guys, we are working with a Heavy forwarder and its receiving logs from a lot of sources and of course sending them into a Splunk Indexer. However, now I'm trying add the functionality to forward (firewall) logs of a specific sourcetype via syslog to another instance which is not from Splunk using a certificate. I tried the steps of the documentation but i wasn't able to do it work properly. Can you give me some help with this please? PD: The documentation i was using: http://docs.splunk.com/Documentation/Splunk/6.5.2/Forwarding/Forwarddatatothird-partysystemsd Thanks you in advance