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Your Jira or SAP Solution Manager instances are already using certain ports which can and should be re-used. Since hosts, ports and usernames can be different, we cannot tell you which are the right ones for your solution. We recommend you to login to Jira instance and/or SAP Solution Manager Web UI to find out the ports being used by the internet browser. Please have a look at the URL. Usually, the Cross Connector is using the same hosts and ports.
Please also note that your internal firewall rules might block the communication even if everything is configured correctly. In this case you must allow these interface connections or you have to use/setup a middleware like SAP CPI.