Owing to more and more powerful applications developed on public domain, people perceive that they can do many things on Internet, which causes the Internet rapidly growing during these years. The problem of exhaustion of IP addresses has thus been awaken in the entire Internet community. Many papers had been proposed for solving this problem , and stricter guidelines for the IP subnets assignments had been made . Therefore, it is no longer easy to get a large number of IP subnets for TANet. In this paper, we will propose a workable scheme that can provide almost every kinds of services on TANet from a small network, like High and Junior High & Preliminary school network, which only consumes one legal IP address to connect to TANet. This scheme uses a Unix host as a fire-wall to connect between TANet and the small campus network, each client PC behind the fire-wall can use the E-mail, Gopher, Archie, Ftp, BBS, News, WWW...services via the fire-wall without consuming a legal IP address. High and Junior High & Preliminary school's small campus networks can then rapidly connect to TANet, and no longer need to wait for the IP subnets to be assigned from TANet administrator. This can solve the lack of IP subnets problem of TANet.