Internet-Security.com TCP port 7443 details

Ignite Realtime Openfire XMPP Server uses TCP 7443 as the default HTTPS port for its HTTP-BIND (BOSH) and (when enabled) WebSocket endpoints, allowing secure web-based XMPP connections.
Organizations deploying Openfire (e.g., with Spark or other XMPP clients) commonly expose 7443 for these secure services.
Zimbra Collaboration Suite versions that bundled Openfire for instant messaging (older releases) also used 7443 for secure BOSH to the IM service.
Openfire plugins such as Openfire Meetings (ofmeet) often serve their secure web components through the same Openfire HTTPS listener on 7443.

TCP 7443