A Virtual Private Network ( Vpn )

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Introduction A virtual private network (VPN) is a private network that extends across a public network, same as the Internet. It allow user to send and receive data across networks that can be either shared or public as if it’s their own device were connected on private network. Application running across VPN have functionality, security, management of the Private network. VPN allow employees to securely access a corporate intranet while located outside the office site. They are used for geographically separated office of an org. to connect as one network. Individual user can use wireless transaction with VPN, to circumvent geo-restriction and censorship, or to connect to proxy servers for the purpose of protecting personal identity and…show more content…
To prevent any kind of disclosure of private information, VPNs allow only authenticated remote access using tunneling protocols and encryption techniques. The VPN security model provides these measures: • Confidentiality: if the network traffic is sniffed at the packet level (see network sniffer and Deep packet inspection), an attacker would only see encrypted data. • Sender authentication to prevent unauthorized users from accessing the VPN. • Message integrity to detect any instances of tampering with transmitted messages. Authentication Tunnel endpoint are authenticated before secure VPN tunnels are created. User created remote VPN. May use passwords biometrics two factor authentication or other cryptographic method. N-N tunnel often use passwords or digital certificate for security. Keys are permanently stored to allow establish automatically without admin know. Routing Tunneling protocols can operate in point to point network topology which theoretically is not vpn, because vpn are to support arbitrary and changing sets of
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