Many people, sometimes even experienced users, are interested in the question: “What can a proxy server do?” and, correspondingly, “What can’t a proxy server do? First, let’s look at what a proxy server can do:

What a proxy server can do

1) By manipulating your IP,a proxy allows you to increase your online secrecy.

2) By caching data, proxy server speeds up access to necessary resources (it is relevant to HTTP proxies).

3) Proxy server allows you to limit access to specific resources, impose various restrictions for various data (for example, you can limit the download speed of video files by a certain mark, and access to social networks by prohibiting access to them, which will relieve the load on the communication channel).

4) The proxy server allows you to filter the data sent through it (it concerns HTTP proxy), thus you can prohibit for example the download of banners (that is, the downloaded Web page will have empty spaces instead of banners).

5) You can also restrict access to the proxy or prohibit the use of various technologies (such as prohibiting the use of FTP).

Below is what proxies cannot do:

What proxy server cannot do

1) Proxy does not implement semantic analysis of downloaded data, that is, if you want to enable a ban on downloads by keywords, you will not be able to cut off pages with such keywords completely.

2) Proxy-server based on SOCKS technology, can not, in contrast to the same HTTP, to filter the content of downloaded content.

3) To receive requests from the outside (although the specifications of the protocol SOCKS 5, allow you to do this, but technically it’s not easy to implement).

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