How VPN, Proxy and DNS work

For copyright reasons, some websites cannot be viewed worldwide and their content, often multimedia, is only available in certain geographic areas.
Knowing this leads us to the awareness that anonymity does not exist on the internet because we are all tracked when we surf.
Providers, network providers and websites know exactly where surfers and visitors connect.
To cover the geographical origin and remain anonymous (at least theoretically) when surfing the internet there are several methodologies including: DNS, VPN and Proxy.
To make a summary of these network tools you need to take a step back and understand how the internet works.
The IP addresses with which computers on the network are identified are assigned by an organization called the Internet Assigned Numbers Authority or IANA.
This information is owned by media companies or websites that read IP addresses, recognize their origin, compare them with the list of countries and decide whether or not to grant access.
If the access mechanism is based only on the IP address, to visit one of these blocked sites in your country it would be enough to change this address which however is assigned by the provider and cannot certainly be changed.
Instead, what you can do is convince the website to which you connect that you come from another IP address than the one assigned.
1) The simplest and easiest way to use is the web proxy .
In practice, you first connect to a computer that is in the allowed country and then navigate from there to the blocked site.
To change Proxy just go to the advanced network settings of the browser and indicate the IP.
Another lists some of the best free proxy lists to use for browsing blocked or obscured sites .
The problem with proxies is that if many computers connect to one, this cannot guarantee decent communication speed for everyone.
In theory, it should increase its network capacity, but then it would certainly not be free and it would cost a subscription.
It is therefore difficult for a free proxy to offer a decent service.
From the point of view of anonymity then the proxies are practically irrelevant since the traces remain stored in well-defined computers.
In addition, many proxy servers end up blacklisted and access is prevented.
2) Another rather interesting method is to create a different Domain Name Server ( DNS ) than the one provided by the internet provider.
This technique tricks the blocked site because it thinks that the connection IP is really the DNS server and not that of the computer.
It is not clear exactly how these services that are not normal proxies work even if, in part, they suffer from the same problem if too many people connect from the same IP.
More information in the article: Open obscured sites in Italy by changing DNS .
3) The third method of accessing blocked sites and surfing without borders is the use of a VPN or a virtual network tunnel separate from the real network.
The VPN can be thought of as a mini-internet that only a select few can use and that connects to a server somewhere in the world using different ways.
Generally, VPN programs are paid even if, as seen in another article, there are also other free VPN services, with more or less limits.
The TOR Project that creates network tunnels to connect to computers scattered around the world and made available by volunteers can also be considered a VPN.
Other free VPN programs that allow you to connect to the internet anonymously and without geographical limits are
1) Proxvpn, for now completely free and without bandwidth limits.
It is a program to be installed for free on a Windows PC that modifies the connection parameters by addressing it in a VPN.
2) Betternet provides a free and paid service.
The free account has limited bandwidth, but it works to stream low quality.
With this it should be clear what it means when you encounter sites with content " not available in our country ".

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