Proxy also known as network allows a network terminal (typically clients) via this service with another network terminal (normally a server) non-direct connection.
Some gateways, routers and other network equipment with network proxy site. Agency services are generally believed to help protect the privacy or security of network terminals and prevent attacks.
Agency services computer systems or other types of network terminal called proxy server.
A complete proxy request process is as follows: The client first establishes a connection with the proxy server, and then requests to establish a connection to the target server or obtain the specified resource (for example, a file) of the agent, is a special kind of network service that target server according to the proxy protocol used by the proxy server.
In the latter case, the proxy server may download the resource of the target server to the local cache.
If the client wants to obtain the resource in the proxy server’s cache, the proxy server does not want to send the request to the target server but directly return cached resources.
What Is Proxy Protocol?
Some proxy protocols allow the proxy server to change the client’s original request to the original server to satisfy the needs of the proxy protocol.
Proxy server options and settings in a computer program typically include a “firewall” that allows the user to enter the proxy address, which covers their network activity and allows filtering across the Internet for network access.
Function of The Proxy Server
- Increase the speed of access: usually the proxy server is set to a larger buffer, when the outside information is passed, but also to save it to the buffer, when other users access the same information, then directly from the buffer remove the information, passed to the user, in order to improve access speed.
- Control access to internal resources: If a university FTP (provided that the proxy address within the allowable access to the resources), the use of educational network address free proxy server, you can use for educational network open all kinds of FTP Download and upload, as well as various types of information sharing and other services.
- Filtering content: for example, limiting access to specific computers, translating data from one language to another, or defending offensive access to both sides of a proxy server.
- Hide real IP: Internet users can hide their own IP through the proxy server, from attack. However, it is only one agent to guarantee safety. A safer method is to use a specific tool to set up an agent chain (e.g. Tor).
- Break their own IP access restrictions: visit foreign sites. China Education Network and 169 network users search as Internet users can visit foreign websites.
- Break through the content filtering mechanism to restrict access to filtered sites. Restrictions on internet access in China search the browser.
But every time the National Day, the two sessions and other sensitive period, the Great Firewall of the firewall wants to improve the blockade, most of the proxy server and proxy software will not be able to connect. (Such as: gate, free door, unbounded browsing, etc.)