One of our customer told us that, his home broadband network port 80 is blocked by ISP, not allow incoming connection to port 80 as http server. Therefore we recommended him to share a global ip and forward back to his home.
The use of sharing global ip is because of port blocking. All server program actually is installed on final computer (very safe).
Simple step to do forward:
1. Find an office A with public/global ip, and allow incoming connection to port 80.
2. Find a computer 1 in the office A.
3. Start up Magic Router with standard routing, port 80 forward to FinalIp:81
4. Click start to finish. Since port 81 of final ip is allowed, therefore set to 81 as forward port in Magic Router of computer 1 in office A.
5. Install Http server (listen port as 81) on computer 2 in the Final network with public ip.
6. Finish, good luck.