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  • Virtual Private Network and it's type

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    VPN is a network technology that is used to create secure network connection over a public network Corporations like government organizations , educational institutions use VPN technology so as to help remote users to securely communicate with a private network.A VPN can connect multiple sites over a large distance.


    Types of VPN:

    1- Secure VPN
    2- Trusted VPN
    3- Hybrid VPN


    Requirements of Secure VPN:

    1-Secure VPN requires encrypted and authenticated traffic.

    2-All parties in the VPN must agree to the security properties.

    3-No outsider (i.e. other than VPN) can affect the security properties of the VPN

    Requirements of Trusted VPN:

    1-Only trusted VPN provider can affect the creation/modification on a path in the VPN.

    2-Only trusted VPN provider can delete data, change data, inject data on a path in the VPN.

    3-We establish the routing and addressing before the VPN is created

    4-The address boundaries of the secure VPN within the trusted VPN must be extremely clear.

    Hybrid VPN requirements

    The secure VPN may be subset of trusted VPN in a hybrid VPN.

    NOTE: A requirement that is common to all the VPNs is that the VPN administrator must have the extent knowledge of the VPN. 

     

    Before purchasing VPN software, always look at best VPN reviews to choose the right solution


    VPN Protocols :

    Below is the list of VPN protocols that make data transport secure over a public network infrastructure. Each protocol has a varied feature in respect of keeping data secure.

    1-IP security (IPSec):

    1-It is used for secure communications over the Internet. It is also used as a security layer for other
    protocols.

    2-IPSec traffic can use either transport mode or tunneling to encrypt data traffic in a VPN.

    2.1-Transport mode: this mode encrypts message within the payload (i.e. data packet)
    
    2.2-Tunneling mode: this mode encrypts the entire payload. 
    

    2 Secure Sockets Layer (SSL) and Transport Layer Security (TLS):

    1-These protocols uses cryptography for secure communications over the Internet.

    2-Handshake authentication method is used that is helpful in negotiating network parameters between the
    server and client machines.

    3-For initating a connection we require an authentication process and certificates.

    3-Point-To-Point Tunneling Protocol (PPTP):

    1-This protocol is used to connect a remote client to a private server over the Internet.

    2-It is a tunneling protocol (i.e. it encrypts the whole data packet while communication).

    3-It is most widely used VPN protocols. We can find it easily with the Windows Operating System.

    4-Layer 2 Tunneling Protocol (L2TP):

    1-This protocol is used for encrypting data communications traffic between two sites.

    2-L2TP is often used with IPSec to secure the transfer of L2TP payload.

    3-A VPN implementation that uses L2TP/IPSec needs certificates or shared key.

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