Patent ID: 8484715

Claim:
A network access method, comprising: obtaining, by a network connection device connected between an Internet Protocol version 4 (IPv4) network and an Internet Protocol version 6 (IPv6) network, IPv4 network attribute information about an IPv4 network device according to an access request for accessing the IPv6 network from the IPv4 network device, wherein the IPv4 network attribute information comprises an IPv4 address of the IPv4 network device and the access request comprises an IPv6 link-local address containing the IPv4 address of the IPv4 network device, the obtaining further comprising extracting, by the network connection device, the IPv4 address of the IPv4 network device from the access request; performing authentication, by the network connection device, on whether the IPv4 network device has a right to access the IPv6 network by authenticating the IPv4 network attribute information; connecting, by the network connection device, the IPv4 network device into the IPv6 network when the authentication is passed; and prohibiting, by the network connection device, the IPv4 network device from accessing the IPv6 network when the authentication is not passed.