A System for Audio Signaling Based NAT Traversal

Mobile users often connect through WiFi access points and frequently find themselves behind NATs that are built into common off-the-shelf home access points or enterprise wireless deployments. Punching a hole through the NATs to establish a P2P connection can be a challenging task for lay users. The authors present their system, ANT, which utilizes Audio signaling for NAT Traversal. With ANT, unlike other NAT traversal approaches, two mobile clients can establish a direct connection with minimal user intervention and without connecting to an intermediate server.