There's No Place Like Home Men's T-Shirt

no place like home

This was kinda funny, but not an exact translation, as Jerad already said the term "loop back" address is more commonly used. If you want to do a network joke that more people would get, you could make a shirt that says "Full Duplex : I go both ways"

127.0.0.1 is a Home I.P. It is In computer networking, localhost (meaning this computer) is the standard hostname given to the address of the loopback network interface. Simply put, when a user sends data to localhost, they will receive their own data. This mechanism is useful for programmers to test their software during development. The name is also a reserved top-level domain name (cf. .localhost), set aside to avoid confusion with the narrower definition as a hostname.

Wikipedia is my source.