An Introduction to VPN Tunnel

An Introduction to VPN Tunnel

VPN or the virtual private network plays an eminent role in maintaining your anonymity while you are using internet. Its essence exceeds to manifolds owing to the fact that it keeps your confidential data secure. Furthermore, it also you to transfer the data only to intended user without enabling the entry of any third party intruder in between. However, to assure such a safe transaction, the VPN tunnel holds the key.

What is VPN tunnel?

It is a tunnel that makes way for safe and secure transfer of data between the host and the destination servers. It also comes handy in establishing an ideal network environment between the server and the remote terminal to which you wish to get connected and access its resources.

Working of VPN tunnel

VPN tunnel assures data integrity and works according to below mentioned steps:

  • Data packets are encrypted with the help of one of the explicitly used VPN tunneling protocols.
  • Data packets are then properly encapsulated with the help of a carrier protocol.
  • At the destination point, the encapsulated data is de-encapsulated to receive the original data.

 Different types of VPN tunneling

Two types of tunneling include voluntary and compulsory.

  • Voluntary VPN tunneling: In this particular tunneling type, the VPN client sets up the connection. At first, the client establishes a connection with the network provider or the ISP. Later on, utilizing this live connection, it creates a tunnel to a particular VPN server.
  • Compulsory VPN tunneling: The carrier network provider is responsible for managing the set up for VPN connection in this type of tunneling. It is quicker than its voluntary counterpart and can be established in just a single step as compared to the two-step process of the other one. This network device is known with varied other names as well such as Network Access Server (NAS), VPN Front End Processor (FEP) and Point of Presence Server (POS).

Tunneling protocols for VPN

Five prominent tunneling protocols are readily used to establish successful VPN connection that include PPTP VPN, L2TP VPN, IPSec, SSH VPN and SSTP VPN. Let us discuss them in brief.

  • Point-to-Point Tunneling Protocol (PPTP): It is among the most widely preferred tunneling protocols and is available as a built in facility in almost all the windows OS versions. It utilizes a control channel over TCP to encapsulate PPP data packets. It itself does not provide authentication or encryption features but is dependent on the Point-to-Point Protocol (PPP). Still, it is the best to provide high security level and remote access during a VPN connection.
    • Layer 2 Tunneling Protocol (L2TP): It is also a capable tunneling protocol that supports VPN connection. Like PPTP, it also does not offer confidentiality and encryption on its own but depends on an encryption protocol for the same that it leverages to assure privacy within the tunnel. It has been developed out of the combination of L2F and PPTP taking their best features and exists at the data link layer in the OSI model, same as PPTP.
    • IP Security (IPSec): It is better known as an assemblage of varied protocols instead of being a single one. When combines with PPTP or L2TP, it provides accomplished encryption solutions and secures the data transfer within a VPN tunnel. It exists at the Layer 3, i.e. Network Layer of the OSI model.
    • Secure Shell (SSH): This is a new protocol as compared all the rest ones and seeks assistance of an encrypted channel to transfer the unencrypted data via a secure network efficiently. In locations where VPN is blocked, SSH somehow manages to hide the identity of users and prevents their IP address from being blocked.
    • Secure Socket Tunneling Protocol: This is yet another effective protocol that makes way for secure data transfer from network server to a remote terminal and vice versa, thereby bypassing all the firewalls and web proxies coming in its way. To accomplish such a successful data transaction, it utilizes HTTPs protocol and is very useful at places where PPTP or L2TP/IPSec cease to perform as per expected.
A part from that several VPN Providers offer Secure VPN Tunnel. To get the list of all Best VPN Service Provider. Stay updated with us as we are going to come up with more information about VPN and VPN Industry.