The deployment environment: there are two different LAN server A and B, A local area network (LAN) in shenzhen, B LAN in huizhou, A local area network (LAN) know public IP: 111.222.111.100, public IP LAN B don't know,

Requirements: in A local area network (LAN) public IP address for the login, make both servers use A public IP to login, use ports to distinguish, such as A login address is: HTTP: 111.222.111.100:8081, B login address is: http://111.222.111.100:8082, is there any way to achieve this, heard that routing super port forwarding can be, but I don't know how to operate, or have other way can also, welcome to share A great god to discuss solutions