IP Masqing does not typically require a high-performance system. How IP Masqing works IP Masqing depends on two components that allow it to function. The first is the public to private network mapping, which is defined by RFC 1918. The second is IP forwarding, a function that works with the mapping to translate an address and forward the resulting packet to the proper location. By using these well-defined networks behind a mapper such as IP Masq, a private network can be built and managed and still have access to the broader network.
Data goes in, something wonderful happens, and data comes out.
Step two, look inside the box. One configuration might look like Figure 1 . The IP Masq box is connected to the Net by any one of a variety of options from dial-up 56K to xDSL or cable modem. To actually communicate with the outside world, the node uses the IP Masq box as a router. The Masq system takes the packet, replacing the original source IP address with its own.