Scheme for SIP to Traverse NAT Transparently
Mo Chen · Jisuanji gongcheng · 2006
Session initiation protocol(SIP),which is delivered by IEFT for IP telephone signaling,is greatly used in video-phone,instant-messaging,and etc.recently.However what makes SIP difficult is the widely using of NAT devices in network,so how to traverse NAT efficiently becomes the SIP researching hotspot.All the existed approaches are reviewed for SIP NAT traversing,and found out their limitation in topology and flexibility.Basing on understanding on SIP,a new SIP NAT traverse approach is developed,which keeps the flexibility of SIP without assuming any topology and maintaining too much addresses mapping information.In the end,the transparency of the approach through a full test is demonstrated.