METHOD AND APPARATUS FOR HANDLING IPV4 DNS PTR QUERIES ACROSS IPV4 AND IPV6 NETWORKS

摘要

The invention discloses for efficient domain name service DNS (processing) PTR (pointer) inquire and reply, and pass through IPv4 IPv6 networks. In general, which IPv4 device for sending over of IPv4 DNS PTR query intercepts to IPv6 domain system servers or receives (302), such as has NAT-PT and DNS-ALG by network equipments configuration. The received IPv4 DNS PTR query of institute is then converted to two different types of IPv6 DNS PTR query: inquiry has ' IP6. INT ', which goes here and there (304) and inquires, to be had ' IP6. ARPA ' strings (306). The IPv6 inquiries of both types are then communicated to the destinations IPv6 dns server (304,306). No matter DNS sends IP6. The IP6 of ARPA. The reply of INT types or the reply of both types, all identification effectively reply (if present), and IPv4 devices are then reached before translation.