Each internet request usually results in a whole series of communication events between multiple points. The way a VPN works is by encrypting those packets at the originating point, often hiding not only the data, but also the information about your originating IP address. The VPN software on your end then sends those packets to VPN server at some destination point, decrypting that information.
To understand the value of a VPN, it helps to think of some specific scenarios in which a VPN might be used. Consider the public Wi-Fi network, perhaps at a coffee shop or airport. Normally, you might connect without a second thought. But do you know who might be watching the traffic on that network? Can you even be sure the Wi-Fi network is legit, or might it operated by a thief who's after your personal data? Think about the passwords, banking data, credit card numbers, and just plain private information that you transmit every time you go online.
Also worth consideration is Windscribe. For your money you’ll get fast speeds, streamlined access to popular streaming services via dedicated endpoints, an unlimited number of simultaneous connections, and the ability to share your encrypted connection (if your wireless router supports this). Kaspersky Secure Connection proved to be a little faster than Windscribe and its subscription rates are a little more generous, too.
It’s also fast with impressive 830+ server locations, which makes it an excellent choice for P2P file-sharing, online gaming, and HD streaming. There are no annoying bandwidth caps here, and you can connect to Netflix US, BBC iPlayer, or France’s Canal+ if you wish – there’s a server for every need. The double encryption will understandably slow things down.
With VPNs you can access streaming services which are usually blocked to overseas viewers. You can do this by simply connecting to a VPN server in the appropriate country. Unsurprisingly, both Netflix and BBC iPlayer attempt to block VPN users. These blocks are often ineffective, and many providers have found ways around them. For more information about unblocking the most common services see our VPN for Netflix and VPN for BBC iPlayer guides.
After you choose your VPN, you must install and maintain it correctly to enjoy all the benefits a VPN can provide. In addition to using a sufficiently long key length, you must properly secure keys and access to VPN concentrators. If you store your keys in plaintext files on Internet-connected computers, all the bits of key length in the world won't help you if someone compromises those computers. You should also change your shared base keys on a regular basis, preferably every 3 months. This practice limits your exposure if a key is compromised.
Transport Layer Security (SSL/TLS) can tunnel an entire network's traffic (as it does in the OpenVPN project and SoftEther VPN project) or secure an individual connection. A number of vendors provide remote-access VPN capabilities through SSL. An SSL VPN can connect from locations where IPsec runs into trouble with Network Address Translation and firewall rules.
Secure Shell (SSH) is a secure version of Telnet that you can use to log on and open a command line on a remote machine. You can also use SSH to establish an encrypted tunnel between two machines, effectively creating a VPN. Different versions of SSH use RSA or Digital Signature Algorithm (DSA) for secure key exchange and 3DES or Blowfish for data encryption. You can use a free program such as Stunnel (http://www.stunnel.org) along with a free version of SSH such as OpenSSH (http://www.openssh.org) to tunnel protocols such as Web and mail protocols through an encrypted SSH tunnel. All you need is a machine at either end running both these programs. SSH and Stunnel are an inexpensive way to implement a VPN, although setting up such a VPN requires a lot of configuration and might not scale to handle a large number of machines. An SSH VPN can, however, make a nice solution for connecting two servers that need to communicate securely, such as a Web server and a back-end database server.
The last thing anybody needs is connecting to a VPN server only to learn that their DNS address is leaking. This can prove detrimental. Especially, if you live in a country with tough internet and copyright infringement laws. Lucky for you, ExpressVPN offers the latest in VPN protocols, coupled with strong encryption and privacy features. The VPN indicate no leakages at all. As you can see, the results below show a Canadian DNS address.
Though Proxy.sh meets many of our basic requirements, in our tests the company’s Safejumper application had constant errors when trying to connect. Given that we were looking for a simple, reliable VPN, this was a dealbreaker. We also found a story from 2013 with bizarre statements from the company about monitoring traffic on a specific server due to concerns about unlawful behavior of a user on the network. Though the transparency is impressive, the decision to actively monitor traffic is disconcerting. In a response given to TorrentFreak at the time, the company stated, “The situation also shows that the only solution we have to help law enforcement agencies find problematic use across our network, is to clearly install a logging capacity on it. As a result, we are able to either comply or shut down the servers we have in a particular location (it happened to us in Czech Republic few months ago).”
As with the previously mentioned VPN services on this list, VyprVPN also provides an extensive DNS Leak Protection (Including IPv4, IPv6 and WebRTC protocols), which is tested by clients. VyprVPN includes support for a L2TP/IPSec protocols as well as OpenVPN. VyprVPN has a no-logging policy. VyprVPN also enforces all IPv6 traffic to be via its network and avoid any IPv6 leaks. Overall, that is a pretty solid VPN in security-wise.