Network address translation device and method based on SDN (Software Defined Network)

Abstract

The invention relates to a network address translation device based on an SDN (Software Defined Network). The network address translation device is applied to an SDN controller and comprises an information acquisition unit, a flow table generation unit and a flow table issuing unit; the information acquisition unit is used for acquiring flow table generation information; the flow table generation unit is used for generating a flow table according to the flow table generation information; the flow table issuing unit is used for issuing the flow table to SDN equipment; and the SDN equipment carries out an operation according to the flow table. The invention further provides a network address translation method. According to the network address translation device and method based on the SDN, which are provided by the invention, network address translation can be more flexible and humanized.

Description

[0001] The present invention relates to the field of network communication, in particular, an SDN-based network address conversion device and method. Background technique [0002] SDN (Software Defined Network) is a software-defined network. It is a new type of network architecture and a way to realize network virtualization. Its core technology is to separate the control plane of network equipment from the data plane through standard interfaces, so as to realize It ensures flexible management and control of network traffic, making the network more intelligent as a pipeline. NAT (Network Address Translation) is the Network Address Translation, which was proposed in 1994. When some hosts on the intranet have already been assigned local IP addresses (that is, dedicated addresses used only on the intranet), but now they need to communicate with the Internet (external IP addresses). When communicating with hosts on the Internet), the NAT method can be used to translate the local I...

AI Technical Summary

Problems solved by technology

[0003] Among them, the traditional NAT function is generally implemented in routers or firewalls, that is, these devices need to be added to the network, which increases the types of devices, increases the cost and increases the difficulty of maintenance. Strategies such as operator selection, load balancing, QoS detection and setting, connection with external systems, etc., but also unable to provide user-friendly statistical information such as the number of connections and traffic data

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