Remote access VPN is very common VPN service that you can set up in your office or home network. It can be implemented by setting up a VPN gateway or server and you can connect to it by using VPN client from other locations .
As you can see from the diagram below, whether at airport, library, restaurant or other public hotspots, the user can launch VPN connection by using VPN client on the computer and connect to VPN gateway .
Whenever the user computer sends the data, the VPN client software encrypts that data before sending it over the Internet to the VPN gateway at the edge of the destination network .
Once the VPN gateway receives the data, it decrypts the data and sends the packet to the destination computer in its private network (office or home network), after that the destination computer will encrypt the returning data as well .
The remote access VPN is supported by L2F, PPTP, L2TP and IPsec tunneling protocols.
Sometimes if the user uses the web browser instead of VPN client to connect to VPN gateway, we call this type of VPN as SSL VPN .
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