Patent ID: 9497168
Filing Date: 2016-11-15
CPC Classification: H04L

Claim Text:
1. A method for determining whether a first computing system within a protected network can communicate with an external computing system, said method comprising: receiving a registration request from at least one of said first and external computing systems; testing, by a registrar that is positioned outside said protected network, whether at least one of the first computing system and the external computing system is publicly addressable by comparing address information indicated by said at least one of said first and external computing systems with address information indicated in a message received from said at least one of said first and external computing systems in order to determine whether said at least one of said first and external computing systems is behind a network address translator (NAT); initiating a creation of a persistent connection between said computing system and a proxy server if said computing system is not publicly addressable; and recording an address of said proxy server for said computing system if said computing system is not publicly addressable.