Freelan is an application to create secure ethernet tunnels over a single UDP port. It can be used to create virtual LANs ("Local Area Network"), hence the name: "freelan".

Freelan may create peer-to-peer tunnel connections or rely on a more classic client/server layout. The virtual network can be shaped to fit exactly the bandwidth or topology constraints, providing an optimal virtual private network.

Freelan is particularly useful for remote sites interconnection and gaming.