Abstract
By exploring the temporary UDP (user datagram protocol) port-mapping time window on NAT (network address translation) devices, the principal of using UDP to work through NAT devices was presented. A detection and handshaking server was proposed to solve the detection of dynamically mapped UDP ports. With packet reflecting service implemented at detection and handshaking server, port-mapping characteristics of NAT device and the external mapped UDP ports can be discovered. The procedures of the discovery process and the procedures of completing a peer to peer connection were presented. The implementation can benefit a broad range of applications like voice over IP, real-time video, file-sharing and peer to peer based distributed computing.
| Original language | English |
|---|---|
| Pages (from-to) | 823-827 |
| Number of pages | 5 |
| Journal | Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics |
| Volume | 31 |
| Issue number | 7 |
| State | Published - Jul 2005 |
Keywords
- Firewall
- Network address translation
- Peer to peer
- Port mapping
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