Provider connection system, packet exchange apparatus thereof, dns server, packet exchange method, and computer program thereof

摘要

The present invention discloses a tunnel-redirection device used as a packet transfer device, in which user can transmit a packet via a plurality of network tunnels simply through the management of a single network tunnel. The tunnel-redirection device 10 switches a packet on a first network tunnel A arranged between a user terminal 1 and a WWW server 3a and a DNS server 3b installed as a center of the provider on Internet 3, arranges a second network tunnel B between the system and a contents server ISP1 of the provider installed in a region "a", extracts a packet from the user terminal on a first network tunnel to a contents server ISP1, converts said packet to a packet of the second network tunnel, transfers said packet to the contents server ISP1, converts said packet from the contents server on the second network tunnel to the user terminal to a packet of the first network tunnel, and transfers said packet to the user terminal.