Peer-to-peer communication across network address translators Export

@inproceedings{citeulike:5059340, abstract = {J'fais des trous, des petits trous... toujours des petits trous- S. Gainsbourg Network Address Translation (NAT) causes well-known difficulties for peer-to-peer (P2P) communication, since the peers involved may not be reachable at any globally valid IP address. Several NAT traversal techniques are known, but their documentation is slim, and data about their robustness or relative merits is slimmer. This paper documents and analyzes one of the simplest but most robust and practical NAT traversal techniques, commonly known as ” hole punching. ” Hole punching is moderately well-understood for UDP communication, but we show how it can be reliably used to set up peer-to-peer TCP streams as well. After gathering data on the reliability of this technique on a wide variety of deployed NATs, we find that about 82 \% of the NATs tested support hole punching for UDP, and about 64 \% support hole punching for TCP streams. As NAT vendors become increasingly conscious of the needs of important P2P applications such as Voice over IP and online gaming protocols, support for hole punching is likely to increase in the future. 1}, author = {Ford, Bryan}, booktitle = {In USENIX Annual Technical Conference}, citeulike-article-id = {5059340}, citeulike-linkout-0 = {http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.71.6308}, keywords = {nat, nat\_traversal, p2p\_nat}, pages = {179--192}, posted-at = {2009-07-05 00:44:52}, priority = {0}, title = {Peer-to-peer communication across network address translators}, url = {http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.71.6308}, year = {2005} }

TY - CONF ID - citeulike:5059340 L3 - citeulike-article-id:5059340 N2 - J’fais des trous, des petits trous... toujours des petits trous- S. Gainsbourg Network Address Translation (NAT) causes well-known difficulties for peer-to-peer (P2P) communication, since the peers involved may not be reachable at any globally valid IP address. Several NAT traversal techniques are known, but their documentation is slim, and data about their robustness or relative merits is slimmer. This paper documents and analyzes one of the simplest but most robust and practical NAT traversal techniques, commonly known as “hole punching. ” Hole punching is moderately well-understood for UDP communication, but we show how it can be reliably used to set up peer-to-peer TCP streams as well. After gathering data on the reliability of this technique on a wide variety of deployed NATs, we find that about 82 % of the NATs tested support hole punching for UDP, and about 64 % support hole punching for TCP streams. As NAT vendors become increasingly conscious of the needs of important P2P applications such as Voice over IP and online gaming protocols, support for hole punching is likely to increase in the future. 1 EP - 192 TI - Peer-to-peer communication across network address translators T2 - In USENIX Annual Technical Conference SP - 179 KW - nat KW - nat_traversal KW - p2p_nat AU - Ford, Bryan PY - 2005/// UR - http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.71.6308 ER -