VPNuzer is a tunnelling software enable you to browse to the internet without worrying of someone monitoring your activities it also unblocked all restricted sites filtered by your internet service provider. Let us read its fetures below:
What is a VPN?
A virtual private network (VPN) allows computers located in different physical locations to be linked via an Internet connection. Businesses no longer need to invest in expensive dedicated lines, because an Internet connection is sufficient to link up subsidiaries and remote users. Since Internet connections are public connections, which are by definition insecure, hackers can intercept and modify data that is transmitted through the Web. However, a VPN allows for data to be encrypted and sent to only one specific computer (or group of computers), thereby creating a private network (because it is only accessible to authorized individuals, unlike the Web environment that everyone can access). However, this is a virtual network in that the link between remote computers is not physical, but passes through the Web. Mobile workers can thereby access an application at their company simply by connecting to a specific website and entering a password.
How can businesses link their various external offices without spending an enormous amount of money on a dedicated line? How can employees access information or applications that are stored on local servers when they’re away from the office? Moreover, how can the security of telecommuters’ connections be ensured? All of these questions are becoming more and more relevant in today’s market. The workforce is becoming more and more mobile, subsidiaries are often connected to one another through software packages installed by headquarters, and for the most part security is not the number one priority during these installations. A study conducted by Taylor Nelson Sofres in various European countries in 2003 found that 24% of German employees access their company’s resources through a secure VPN connection, while this number reached only 10% in England and 8% in France. However, the VPN (virtual private network) offers businesses the opportunity to protect their connections at a lower cost than other solutions involving a dedicated line. The standards for this technology are developing rapidly.
Encryption and "Tunneling"
In order to protect the data that passes through the virtual private network, it must be encapsulated through a process called “tunneling”, which places the data in digitized envelopes. The word “tunnel” is used to symbolize the secure space that is created within the Web connection. Businesses have to use specific software at each end of the “tunnel” (the sender and the recipient) to encrypt and decrypt the encapsulated data in the same way. A data compression step is often added to this transmission model to prevent the network from becoming saturatedby the load of the encrypted packets. A VPN server, which is a computer that manages the demands for connections made by remote users and routers (in the case of subsidiaries), is also necessary.
Tunneling Protocols
In order for data to remain legible at each end of the tunnel, the same tunneling protocol must be used by each component of the VPN. There are several protocols available with different levels of security, such as PPTP (Point-to-Point Tunneling Protocol), L2F (Layer Two Forwarding), L2TP (Layer Two Tunneling Protocol), and IPSec. Among these protocols, PPTP and IPSec afford the highest level of protection.PPTP allows data packets to be encapsulated in an IP datagram, thereby creating a point-to-point connection. In this scenario, data is twice as protected because the information on the local network (such as machine addresses) is encapsulated inside a PPP message, which is itself encapsulated inside an IP message. IPSec offers three modules (Authentication Header, Encapsulating Security Payload, and Security Association) that improve the level of security by ensuring confidentiality, integrity, and data authentication.
