Site to Site VPN

Posted by AJ × 09:26

Site to site tunneling is used to connect multiple fixed sites of an organization over a public network.

It can be classified as either intranet or extranet

1. Internet : it is used to connect various remote site LANS of an organization into

a private network

2. Extranet: it allows two organizations to work in a shared environment through a tunnel built to connect them.

Three types of VPNs are shown in below figure.

The office 1 main campus and branch campus are connected through the intranet VPN.

The office 1 main campus also connected to office 2 through the extranet VPN.

The office 1 main campus can also access their corporation through a remote-access

VPN. The main benefit of a VPN is scalability with a reasonable cost.

Both Generic Routing Encapsulation (GRE) and IPsec are encapsulating protocols used in site-to-site VPN

Figure. Three types of VPN: Remote VPN,Site to Site VPN(Intranet and Extranet

VPN)

Fig: Three types of VPNs to and from a headquarter organization

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