Method and apparatus for communication of data packets between local networks
US8295285B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2009 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Oct 26, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method and arrangement for obtaining unambiguous addressing for data packets communicated between devices in two different local networks using private IP address spaces. A VPN tunnel is initially established between gateways in the two local networks and an internal IP address space is defined in each network for devices in the opposite network, not overlapping with an internal IP address space used for its own devices. When the gateway of one network receives a data packet from a device in the opposite network, the packet's header is modified by changing the destination and source addresses, which belong to address spaces valid in the opposite network, into addresses belonging to address spaces valid in the present network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.