A network address translation method for ipv6-in-ipv4 tunnel packets
A network address translation and ipv4 address technology, applied in the field of network address translation, can solve the problems of low upgrade cost and inability to work, and achieve the effect of easy operation, removal of redundancy, and scalability.
Active Publication Date: 2018-05-01
STATE GRID CORP OF CHINA +3
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Problems solved by technology
[0008] Aiming at the problems of the prior art, the present invention proposes a network address translation method for IPv6-in-IPv4 tunnel packets, which performs two-layer (or multi-layer) network address translation on identified 6in4 tunnel packets, and solves the problem of 6in4 tunnel technology in The defect of not being able to work in the network environment with network address converters is transparent to users, and the upgrade cost is low; it not only reduces the complexity of user management and is easier to operate; it also improves user utilization while saving costs
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[0054] The present invention will be further described below in conjunction with the accompanying drawings.
[0055] Such as figure 2 Shown, a kind of network address translation method of IPv6-in-IPv4 tunnel packet, such as Figure 5 As shown, replace the network address translation NAT device with the NAT6in4 device;
[0056] Such as figure 1 As shown, the NAT 6in4 device receives the data packet sent by the 6in4 tunnel endpoint and judges whether the data packet is a 6in4 tunnel packet; wherein, the 6in4 tunnel packet is an IPv4 data packet whose Protocol field is 41.
[0057] When the first endpoint of the 6in4 tunnel on the internal network communicates with the IPv6 server on the external network, the NAT 6in4 device performs source address translation on the 6in4 tunnel packets sent from the first endpoint of the 6in4 tunnel to the second endpoint of the 6in4 tunnel.
[0058] The source address translation includes: converting the source IPv4 address and the inner ...
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The invention provides an IPv6-in-IPv4 tunnel packet network address translation method. The method includes the step of replacing a network address translation (NAT) device with an NAT 6in4 device. The method is characterized in that the NAT 6in4 device receives a data packet sent by a 6in4 tunnel endpoint, judges whether the data packet is a 6in4 tunnel packet with the Protocol field of 41 or not, and conducts corresponding address translation operation according to the judgment result. The problem that an existing 6in4 tunnel technology can not work under the network environment with a network address translator is solved, and the method is transparent for users and low in upgrading cost; the user management complexity is lowered, and operation is easier; the utilization rate is increased for the users while cost is saved.
Description
technical field [0001] The invention relates to a network address translation method, in particular to a network address translation method for IPv6-in-IPv4 tunnel packets. Background technique [0002] With the development of Internet technology and the increasing number of people using the Internet, one person with multiple terminals has become the main trend today. In this case, the need for an IP address becomes more urgent. Since the IPv6 technology was first proposed in the early 1990s, it has attracted widespread attention in the industry and is considered to eventually replace IPv4. However, how to smoothly transition from IPv4 to IPv6 is the key to the problem, and it will take a long time. [0003] The technologies for realizing the above transition are divided into three types: dual stack, translation and tunnel. Among them, tunneling technology refers to encapsulating IPv6 data packets into the payload of IPv4 data packets, using IPv4 as the link layer of IPv6...
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IPC IPC(8): H04L29/12
CPCH04L61/2517H04L61/2592
Inventor 胡紫巍张庚周静赵钦
Owner STATE GRID CORP OF CHINA