Method to establish a peer-to-peer connection between two user agents located behind symmetric NATs

摘要

A method to establish an Internet connection between a first (1) and a second (2) user agent is described, wherein a NAT-table entry in a controllable NAT (7) located in the Internet (3) is generated, wherein said NAT-table entry comprises public IP-address:Port pairs that are communicated to the user agents (1, 2), wherein the user agents (1, 2) use said public IP-address:port pairs for establishing an Internet connection between each other via the controllable NAT (7).