In the progressive world of today, there are businesses, which in order to grow into multiple cities, locations, all over the globe. However, to keep everything centrally organized, people working in these different locations will need to communicate with each other and for the sake of keeping these communications reliable and secure from a remote location, the need for establishing a Virtual Privacy Network arises. How VPN server works:
VPN’s are a way to make sure the communications from all these remote locations are kept secure. The networks created privately use a public network to create a private channel between the two machines communicating with each other and through the use of this channel, the information can be kept encrypted from prying eyes.
In more elaborate terms, the VPN network helps two machines create a bubble in between them and through this bubble, only the two machines connected with each other can communicate. The bubble created works on a temporary basis and after the communication is over, the bubble ceases to exist. If more information is needed to be shared, another bubble will be created.
The exchange of information through this private line in known as channeling while the content that is being passed through is known as wrapping. The actual content of the package being exchanged is kept hidden until it reaches its destination. But while traveling through the private line, the package has an encrypted key which is enough to get the package to its location.
There are two forms of operations that can be performed through a VPN network and the type of operation depends on the operation. The first kind is the one-way operation – in this kind of operation, there is a definitive sender and a receiver and the communication can be done only in one direction at a time. The best example for this kind of operation can be walkie-talkies which work on a single module and the exchange of information is one way at a time.
For this kind of operation, a VPN software is required to remotely access the network while there is no agreement with another network to form a shared connection. Through the use of a VPN software installed at the user end, the connection to a network can be established, however, this connection can only be one directional.
In the second form operation, the two-way communication does not need the installation of a VPN client. An agreement is made between the receiver and the sender for the exchange of information through a shared channel while both the receiver and the sender have the authority to generate and authenticate their own encrypted keys.
In general use, one-way operations are used and are very useful to people who are constantly traveling and are trying to connect to a central location from various sites. The requests are generated through the VPN client software and only authenticated systems are allowed into the network.
For access to information, an end point can be set up which allows the traffic to enter into the secure network. As the name suggests, an end point is where the actual access to the network is granted. There are various kinds of endpoints, the first kind is the end point being the actual firewall while the second kind is the endpoint being put in front of the firewall. Both of these suggested solutions have their pros and cons.
If the VPN is set up in a manner that it is placed in front of the firewall, no actual burden falls on the firewall and all the traffic entering into the secure network will already have gone through the filtration process. But if this kind of setup fails, the vulnerability of the network is endless.
Considering this, the optimum solution does seem to have your firewall serve as the end point. But this kind of set up puts a heavy burden on the firewall itself and might become the cause for a bottleneck to be formed.
The third solution is to have the end point inside the firewall which will relieve the heavy burden. But this leaves the actual function of a firewall to stop existing as this kind of a setup will leave a firewall no choice but to let the information pass unchallenged.