Patent ID: 9143421
Filing Date: 2015-09-22
Classification: H04L

Abstract:
1. A network system capable of implementing Session Traversal Utilities for Network Address Translation (STUN) with the assistance of two network devices, the network system comprising: a coordinator server located in a public network; a first Network Address Translator (NAT) located in a first private network and configured as a full-cone NAT; a first network device located in the first private network, connected to the public network through the first NAT, capable of assisting other network devices in obtaining NAT information, and having registered a first mapped address and a second mapped address with the coordinator server; a second NAT located in a second private network and configured as a full-cone NAT; a second network device located in the second private network, connected to the public network through the second NAT, capable of assisting other network devices in obtaining NAT information, and having registered a third mapped address and a fourth mapped address with the coordinator server; a third NAT located in a third private network; and a third network device located in the third private network and connected to the public network through the third NAT, wherein the third network device can obtain the mapped addresses from the coordinator server and, based on the mapped addresses, conduct NAT behavior tests on the third NAT through the first network device and the second network device.