Proxy server (SDN)

A proxy server in the context of Software-Defined Networking (SDN) is a specialized intermediate component in Software-Defined Networking (SDN) that acts as an intermediary between network devices and the SDN controller, providing management, filtering and optimization of network traffic.

In the traditional sense, a proxy server is an intermediate server that accepts requests from a client and forwards them to a destination server, and can modify, cache, or filter traffic. In the SDN space, a proxy server serves a similar role, but with an emphasis on network flow control and communication between the controller and switches.

The role of a proxy server in SDN

• Intermediary between the controller and the switches
  The proxy server receives commands from the SDN controller and passes them to the network devices, and collects network status information for the controller.
• Traffic optimization and filtering
  It can filter unwanted requests, provide security, and manage data flows, reducing the load on the controller and improving network performance.
• Caching and accelerating request processing
  A proxy in SDN can cache frequently used rules or data, minimizing delays in routing decisions.
• Increased security and anonymity
  Similar to classic proxies, SDN proxies can provide an additional layer of protection by hiding internal network details and controlling access.

Thus, a proxy in SDN is a specialized component that acts as a mediator and optimizer in a software-defined network, ensuring efficient management, security and scalability of the network infrastructure.