Patent ID: 9602333
Date: 2017-03-21
CPC Classifications: H04L

Claim:
1. A method of managing a DNS request carried out by a DNS server, said method comprising: receiving a DNS request from a first gateway in order to access a remote application accessible via a second gateway, the first gateway and the second gateway each being allocated a shared IP address which is shared with at least one client device to which the shared IP address is allocated and a range of a plurality of ports for the shared IP address; sending to the first gateway a DNS response including the shared IP address of said second gateway; a verification step for determining whether a port range identifier, identifying the range of the plurality of ports allocated to said second gateway, is stored in said DNS server in association with the shared IP address of said second gateway; and inserting said identifier in the DNS response before sending said DNS response to the first gateway if the port range identifier, identifying the range of the plurality of ports allocated to said second gateway, is stored in said DNS server in association with the shared IP address of said second gateway.