I have not seen a port to attach a hose penetrating the firewall. Does this port compromise the firewall?
If you are talking about a Central Vacuum Port in the garage wall to the house, it is not a problem unless it is a rated wall.
If it does not have a rating, then it is a non-rated wall and just a separation and the only requirement is (basically) to seal around penetrations so flame does not go through the surface of the wall around the penetration.
Hope that helps.
How did you determine that it was a rated wall and what was the wall rated at.?