välittäjäpalvelimen

Välittäjäpalvelin, often translated as proxy server, is an intermediary server that acts as a gateway between a client requesting a resource from another server and the server providing that resource. Instead of a client connecting directly to a web server, it sends its request to the välittäjäpalvelin. The välittäjäpalvelin then forwards this request to the destination server. The response from the destination server is sent back to the välittäjäpalvelin, which in turn relays it to the original client.

Välittäjäpalvelimet serve several purposes. One common use is for enhanced security. By acting as a buffer, they can hide the IP addresses of the internal clients, making them less vulnerable to direct attacks. They can also be used for content filtering, blocking access to certain websites or types of content. Performance can also be improved through caching. A välittäjäpalvelin can store frequently accessed web pages or files locally, so subsequent requests for the same content can be served much faster without needing to fetch them from the original server again.

Another application is to bypass geographical restrictions or censorship. By connecting to a välittäjäpalvelin located in a different region, users can access content that might be blocked in their own location. Companies often use välittäjäpalvelimet for network management, monitoring internet usage, and enforcing security policies. There are different types of välittäjäpalvelimet, including forward proxies, which handle requests from clients, and reverse proxies, which handle requests directed at servers.