Method for NAT traversal in VPN
US10673813B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2018 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Sep 29, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/2592
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method for NAT traversal in VPN so that the VPN can detect the rule of port allocation for NAT outside the VPN to achieve NAT traversal. The communication structure according to the present invention includes a public network, a client network, a destination network, a first NAT, a second NAT. A DNAT-T proxy server is installed between the first NAT and the second NAT and has the function for the VPN to conduct a plurality of (N times) registrations before sending data out to detect the rule for NAT port allocation of the DNAT-T proxy server, and then inform the next NAT port allocation to the other side of the VPN so as to achieve NAT traversal for the data packets in VPN.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.