How Does VPN Work?

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2019-08-14

VPN is considered to be a series of virtual connections routed over the internet which encrypts your data as it travels back and forth between your the machinery of the client and the internet resources which you're utilizing, as the web servers. Many internet protocols have built-in encryption, like the HTTPS, NNTP, SSH, and LDAPS. So assuming that each and everything which would be involved is working properly if you use those ports over a VPN connection, your data is encrypted at least twice!

Many enterprises would be insisting that their employees utilize their VPN if they're working remotely by connecting to their office network from home. Sometimes people would utilize a VPN when they're using BitTorrent so as to pirate media so that they don't get caught and their ISP couldn’t stop them. We are not condoning piracy. But to those people, we would strongly suggest avoiding VPNs which would be advertised through ads on The Pirate Bay as they are likely not what they seem and might even be malicious. Sometimes people would be utilizing VPNs because they're understandably meticulous of their everyday security. That's an excellent reason to use them. If you wish to gain more knowledge about VPN, SPOTO would be your best bet.

PCs, smartphones, tablets, dedicated servers, and even some IoT devices could be endpoints for the connection of the VPN. Most of the time, your client would require to use a VPN connection application. Some routers might also have built-in VPN clients. Unlike proxy networks like the Tor, VPNs shouldn't noticeably slow down your internet traffic under normal circumstances. But some VPNs are considered faster than others, and one of the most important factors is how many VPN clients would be using a VPN server at any given time.

A VPN connection would usually work like this. Data is considered to be transmitted from your client machine to a point in your VPN network. The VPN point encrypts your data as well as sends it through the internet. Another point in your VPN network would be decrypted your data as well as sends it to the appropriate internet resource, like a web server, an email server, or your company's intranet. Then the internet resource sends data back so as to a point in your VPN network, where it would gain encryption. That encrypted data would be sent through the internet to another point in your VPN network, which would decrypt the data and sends it back to your client machine. Sounds Easy right!

Certain types of VPNs would be able to use different encryption standards as well as technologies. Here's a quick list of some of the technologies which would be utilized by the VPN:

• Point-to-Point Tunneling Protocol:

PPTP would have been around since the mid-1990s, and it is still frequently used. PPTP in and of itself wouldn’t do encryption. It tunnels data packets as well as then uses the GRE protocol for encapsulation. If you would be considering a VPN service which would be utilizing PPTP, you should keep in mind that security experts like Bruce Schneier have found the protocol, especially Microsoft's implementation of it, so as to be quite insecure.

• IPSec:

You would be required to consider IPSec to be a better alternative to PPTP. IPSec is actually considered to be a suite of different protocols as well as technologies. Packet encapsulation is done through the ESP protocol, and AES-CBC, AES-GCM, 3DES-CBC, or HMAC-SHA1/SHA2 which might be used for encryption.

So, here we have learned about how VPN works actually, but if you wish to gain more information regarding the same, you should check out the courses offered by the SPOTO.

About SPOTO

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