Bigfix TRC access query

Is there a way we can host TRC link on public domain and try accessing machines remotely for support ?

Can you explain your requirement on more details ?
What link are you referring to ? Do you mean the On-demand URL ?

If you need to access machines which are on internet (no intranet connection) you need to use a Broker and use broker sessions.

If you need to open or join broker sessions from a computer on internet (no intranet connection) you can use the Lite Web Portal and you need a Broker for this.

Is that what you were asking for ?