Virtual Private Networks or VPNs have become commonplace for an incredible number of users across the world in both their personal lives and their workplaces. Essentially they allow computers on separate local networks (LANs) in numerous locations for connecting to one another across the general public connections of the internet without other people being able to see or intercept the information that's travelling between them.

They are ideal and vital for connecting employees who work on the move, at home or from satellite office locations as well as private people who need to connect making use of their home networks when they're out and about. Users can connect to local networks through VPNs from any type of device, if it be a desktop computer, a notebook, a tablet or possibly a mobile phone, and from any geographical location provided that they've an internet connection. A lot of people even utilise VPNs to connect to networks in other locations in order to then connect with the remaining world with the looks to be in that physical locations.

VPN Technology

Simply speaking VPNs work by making a tunnel for connecting the two end points (computers, networks etc) through which all information can travel securely. These tunnels are virtual connections which replace the older physical systems such as the dedicated leased lines that businesses would previously have experienced to buy to get in touch their local networks together.

The virtual tunnels actually involve the sending and receiving of packets of encrypted information which are encapsulated within outer packets. The outer packets will also be encrypted and pre-programmed making use of their source and their destination, and only the destination points are configured to decrypt them. The packets are utilized in conjunction with authentication measures at each end to ensure that the proper users and items are accessing the connection. If anyone intercepts the packets while they take their journey across the public networks, they will only have the ability to determine the firewall/gateway server that they're heading towards, but none of the data contained within them or their final destination on the area network.

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Types of VPN

You can find three forms of VPNs that offer users with the functionality described above and these fall within both categories: computer-to-network VPNs and network-to-network VPNs.

Computer-to-network VPNs, or remote access VPNs, connect users on individual devices to a remote network via the net as if their device was really on the network in situ. The user simply installs software on the machine which creates the secure link with a gate way or VPN server on the local network. They're the perfect solution is for employees working at home or on the go who have to'remote in'and access work networks, files and systems.

Network-to-network VPNs, or because they are commonly referred to, site-to-site VPNs, in short connect two separate local networks across the web forming one virtually unified network, using VPN servers on each network as opposed to software on individual machines. They can be further broken down into Intranet vs Extranet VPNs.

Intranets allow users/employees within the exact same organisation to log in to a conjoined secure network from multiple office locations. Along with being password protected to authenticate each user, these intranets are usually limited to only accept connections from the specified networks. They're therefore ideal for businesses which are spread across different geographical sites in order that employees could work for a passing fancy files, folders and systems seamlessly without having to replicate these on each network or transfer them less securely over the internet.