39 results about "NAT64" patented technology

An apparatus and method are described for translating between IPv6 and IPv4 addresses on a computer network. For example, one embodiment of a method for generating an Internet Protocol Version 6 (IPv6) IPv6 address from an Internet Protocol Version 4 (IPv4) IPv4 address literal comprises: constructing a host name for a domain name query at a first host by combining the IPv4 address literal with a domain name of a first domain name server, the first domain name server configured to interpret the host name containing the IPv4 address literal to generate an A record including the IPv4 address; wherein the A record is usable to generate a synthetic IPv6 address, the synthetic IPv6 address including a first portion identifying a network address translation (NAT) 64 server and a second portion identifying an IPv4 host associated with the IPv4 address literal; and receiving the synthetic IPv6 address at the first host, the synthetic IPv6 address usable by the first host to connect to the IPv4 host through the NAT64 server.

The invention discloses a method, device and system for sending data. Wherein when receiving the first IPv6 address information sent by the DNS server, extract the IPv4 address information from the first IPv6 address information; send the prefix query request to the prefix discovery server PDS, wherein the prefix query request includes IPv4 address information, so as to query IPv4 address information belongs to the NAT64 node prefix information of the network segment; when receiving the NAT64 node prefix information sent by the PDS, use the NAT64 node prefix information and IPv4 address information to generate the second IPv6 address information; send the IPv6 data packet to the second IPv6 The NAT64 node associated with the address information, so that the NAT64 node translates the IPv6 data packet into an IPv4 data packet, and forwards the IPv4 data packet to the specified IPv4 server. By configuring corresponding prefix information according to different IP address network segments, the XLAT function can be extended to realize the use in multi-gateway scenarios.

A method implemented in a host node for communicating with a corresponding node through one of a plurality of available networks that includes: receiving a request to initiate a connection with the corresponding node from an application executing on a host node, sending a request to a DNS64 node for an address of the corresponding node, receiving a virtual IPv6 address for the corresponding node with a generic prefix, selecting a connection to one of the plurality of networks through which the data is to be forwarded to the corresponding node, and sending the data to the corresponding node using a virtual IPv6 address for the corresponding node with the prefix of the NAT64 node in the network of the selected connection, whereby the host node is able to maintain connectivity with the corresponding node despite having connections to the plurality of networks that each have NAT64 nodes.

The embodiment of the present invention provides a method for allocating addresses, including: configuring a DNS server and a DNS64 server for the same access point of the gateway; judging whether the terminal requesting to access the network server supports the IPv4 protocol stack; Allocate a DNS address pointing to the DNS server; wherein, the DNS server is used to send the IPv4 address and / or IPv6 address of the network server to the terminal, and the DNS64 server is used to convert the IPv4 address that only supports the IPv4 protocol stack to the terminal. The IPv4 address of the web server is synthesized into an IPv6 address and sent to the terminal. The embodiment of the invention also discloses a device and system for allocating addresses. By adopting the present invention, different addresses can be assigned to the terminal according to the type of protocol stack supported by the terminal, so that the dual-stack terminal always accesses the IPv4 server with the IPv4 protocol stack, which reduces the cost of the operator, improves the user experience, and avoids various problems of NAT64. kind of defect.

The present invention discloses a system and method for achieving intercommunication between an IPv4 network and an IPv6 network based on an NAT64, and relates to the field of an IPv6 transitory technology. The method includes the following steps: ensuring that an NAT64 module is connected to the IPv4 network and the IPv6 network to achieve global enabling and interface enabling of functions of the NAT64; receiving, by the NAT64 module, a data message sent from a network side, updating a dynamic table, establishing address mapping information which maintains a sub-module, and obtaining an address 5-tuple flow after translation according to the protocol version of the data message; performing, by the NAT64 module, protocol translation on an IPv4 message head and an IPv6 message head; and forwarding, by an IPv4 / IPv6 message forwarding sub-module, a new data message completing the translation of address and the translation of a protocol to a target address. Relevant functions of the NAT64 can be fully achieved on a conventional digital communication product, the performance consumption of equipment and the usage of system resources are effectively reduced, and the working efficiency is increased.

The present invention is applicable to the field of Internet communication, and provides a method and system for realizing VPN mutual access across IPv6 and IPv4. When the VPN on the IPv6 side initiates a data access message for the VPN on the IPv4 side, the method includes: according to the DNS64 server Parse the destination identifier to obtain the destination address, which is carried in the data access message; obtain the NAT64 address pool bound to the sequence number of the ACL according to the source IPv6 address carried in the data access message, and according to The VPN bound to the serial number of the ACL obtains the VPN on the IPv4 side; converts the source IPv6 address into a source IPv4 address that can be used in the VPN on the IPv4 side according to the NAT64 address pool; strips off the prefix of the destination address to obtain a legal destination IPv4 address; According to the destination IPv4 address, the VPN on the IPv4 side forwards the data access message through the IPv4 protocol stack. By applying the method and system for mutual access between different VPNs through NAT64 of the present invention, the mutual access between different VPNs can be easily realized, the configuration is simple and convenient, and the security performance is high.

The invention discloses a network access method and network conversion equipment, and aims to provide a universal network access method for a dual-stack terminal and lower processing loads of a network and a server. The network conversion equipment is arranged among networks provided by different network providers, and distributes a default route to a network terminal under management. The method comprises the following steps that: the network conversion equipment receives a network access request message sent by the network terminal according to the default route when the route is unreachable during network access through a destination address to be accessed, wherein the destination address to be accessed is an Ipv6 (Internet Protocol Version 6) address; the network conversion equipment determines an IPv4 (Internet Protocol Version 4) address corresponding to the destination address to be accessed; and the network conversion equipment performs NAT64 conversion on the network access request message, and forwards the network access request message which undergoes the NAT64 conversion to the determined IPv4 address corresponding to the destination address to be accessed.