Patent ID: 9178749
Filing Date: 2015-11-03
Classification: H04L

Abstract:
1. A method, comprising: in response to receipt at a first level authority of a first request for a domain, the first level authority operative within a multi-tier nameserver hierarchy, the first request including an IPv4 source address of a client caching nameserver (CCNS) making the first request, returning to the CCNS information identifying at least an IPv6 authority and zero or more IPv4 authorities, where the IPv4 source address of the CCNS is encoded in an IPv6 address of the IPv6 authority, the IPv6 authority being one of a set of IPv6 authorities that share a security key that is rotated periodically and time-stamped, the security key being used only after all IPv6 authorities in the set have received it; receiving, at the IPv6 authority that is a second level authority within the multi-tier nameserver hierarchy, a second request, the second request having associated therewith an IPv6 address of the CCNS that includes the IPv4 source address of the CCNS encoded therein; and at the IPv6 authority, saving an association between the IPv4 source address of the CCNS and the IPv6 address of the CCNS.