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Network address coverage judgement device, device and method in multi-level NAT network

A network address and service device technology, applied in the field of network address coverage discrimination equipment, can solve problems such as difficult detection of network address coverage

Inactive Publication Date: 2011-10-19
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to overcome the defect that the network address coverage is difficult to detect in the existing multi-level NAT network, the present invention provides a network address coverage discrimination device, device and method in the multi-level NAT network

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  • Network address coverage judgement device, device and method in multi-level NAT network
  • Network address coverage judgement device, device and method in multi-level NAT network
  • Network address coverage judgement device, device and method in multi-level NAT network

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Embodiment Construction

[0052] A network address coverage discrimination device, device and method in a multi-level NAT network provided by the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0053] The IP address is a 32-bit binary value used to mark the address of each computer in the TCP / IP communication protocol, usually expressed in dotted decimal notation, such as 192.168.0.5.

[0054] Each IP address is divided into two parts, the network number part and the host number part. The network number indicates the number of the network segment to which it belongs, and the host number indicates the address number of a host in the network segment. According to the size of the network, IP addresses can be divided into A (1.0.0.0--126.0.0.0), B (128.1.0.0--191.254.0.0), C (192.0.1.0--223.255.254.0), D (224.0 .0.0--239.255.255.254), E (240.0.0.0--255.255.255.255), among which A, B, and C are the three main types of addresses, and...

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Abstract

The invention discloses a device for identifying network address coverage of a multi-level NAT network address. a network address of a service requester and a mask of a network address of a service responser are used together to obtain a network segment number which is compared with a network segment number of the service requester, and if the network segments are equal, the network segment number of the network of the service requester is judged as covering the network address of the service responser; if the network segments are not equal, the the network segment number of the network of the service requester is judged as not covering the network address of the service responser. The application of the invention ensures that a main machine of a lower level of NAT network can correctly accesses a main machine of an upper lever of NAT network of the same root.

Description

technical field [0001] The present invention relates to the technical field of computer network identification, and more specifically, the present invention relates to a network address coverage discrimination device, device and method in a multi-level NAT network. Background technique [0002] Within a group of enterprises that choose to use the private address space for collaborative communication, each private address needs to be guaranteed to be unique, so that communication can be realized within the private network. Private addresses have no global significance in public networks, so there is no need to propagate private network routing information on links between enterprises, and packets with source or destination addresses that are private addresses should not be forwarded on such links. [0003] The network number and host number in each IP address can be calculated based on the subnet mask. After the IP address and subnet mask are given, it can be determined that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12
Inventor 傅川王迪张国清秦卓琼
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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