Before creating the RFC, be sure that our SAP Solution Manager system trusts the Jira Server. Please, request your Basis Team to set up the connectivity configuration.
Please follow the steps to create the RFC to Jira:
Call the transaction SM59 and create destinations of type G.
In the tab Logon & Security, use basic authentication and for the security option, use SSL.
Use here the User created in the Jira System that will be used for the integration process.
Test the connection and check if the external tool can be reached.
Attention: Please be sure that all SSL Certificates are distributed between SAP Solution Manager and Jira in order to have the connectivity settings totally functional.