Today world, VPN is use in all over. Checkpoint was one of the VPN founds, but today, a lot of routers and firewalls typically have such capability built-in. A number of companies also provide VPN concentrator/server offerings as well.

Virtual private network is technology that permits a main computer network to expand its boundaries away from its physical boundaries using hardware that understands certain communication protocols (PPTP, IPSec, L2TP) that permit it to tunnel through another network/circuit to its remote extension directly to a client or another network.

This tunneling protocol permits computers, servers, and other network devices to treat similar devices on the remote side like they are on the same network. When the Internet became more commercialized, virtual private network technology changed!