One Public IP address for 4 different hotspots

Hi everyone,

Please help me.

I have internet connection in one building (Bulding 1) and there I have one pc running mikrotik as hotspot for the residents inside the building and a RB333 on the roof running also hotspot for other people living around.
Now I created a link on one of the wlan from the roof and I connected two other buildings as follow:

Building 2 - RB133 with 3 antennas running hotspot for the people inside and outside the building.

And

Building 3 - RB532 with 2 antennas, also running hotspot for the people inside and outside the building.

They are all working fine, the two hotspots on the building1 and the other two on the remote buildings 2 and 3.

The problem is that I don’t know how to connect to the buildings 2 and 3 using winbox.

I’m able to connect to the two hotspots on building 1 using ports 8291 and 8292.

Anyone knows what can be done to connect to all 4 devices using winbox or anything else?

Thanks for your help, all answers will be very much appreciated.

Set up a VPN to dial into the network, assuming its routed, then you can access the other AP’s. My main AP is available by public IP. The rest are only available from inside the network.