VPN technologies

Virtual private network (VPN):

Virtual private network (VPN) is a network that is constructed to connect two private network, such as a company's internal networks over Internet for transmitting data. The systems in VPN use encryption and other security mechanisms to ensure that only authorized users can access the private network and that the data cannot be eavesdropped.

A VPN provides a secure, encrypted tunnel to transmit the data between the remote user and the company’s network. The information transmitted between the two locations via the encrypted tunnel cannot be read by anyone else because the system contains several mechanisms to secure the company's private network.

Firewall has a provision to create Virtual Private Network that allows you to securely access your organization network over the Internet. It allows you to share keys and SSL certificates for secure authentication during connection. It also allows both site-to-site and remote connections to access the private network.

Firewall provides the following three types of VPN:

1. IPSec VPN: This VPN uses layer 3 IP security standard to create secure tunnels between the client and the server.
2. PPTP VPN: Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables the secure transfer of data from a remote client to a private enterprise server by creating a VPN across TCP/IP-based data networks. This VPN uses MPPE authentication for connection between client and server
3. SSL VPN: This VPN uses SSL certificates and Public Key Infrastructure (PKI) for authentication and encryption of the tunnel between client and server.
4. L2TP:  The Layer Two Tunneling Protocol (L2TP) enables you to provide connections to your network through private tunnels over the internet. The firewall supports L2TP as defined in RFC 3931.