Destination address rewriting to block peer-to-peer communications
US9723023B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2013 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | May 18, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/104
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for protecting a network including providing a mapping between internal addresses as seen by devices of the protected network and external addresses; providing devices with a mapped address for a destination in response to a lookup request; rewriting, at a gateway, destination addresses of packets exiting the protected network based on the mapping; and rewriting, at the destination-network gateway, source addresses of packets entering the protected network based on the mapping. Embodiments include a gateway coupled to a protected network, an external network, and a name server. The name server, in response to a hostname lookup request, configured to provide a network device with the internal address; and the gateway with a mapping including the internal address, the addresses of the device, and the hostname. The gateway configured to rewrite destination addresses of outbound packets, and source addresses of inbound packets, based on the mapping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.