Appendix B: Configuring Firewalls for VPN

Overview

The following list shows common configurations of firewalls with a virtual private network (VPN) server:

• The VPN server is attached to the Internet, and the firewall is between the VPN server and the intranet. This configuration is referred to as “VPN server in front of the firewall.”

• The firewall is attached to the Internet, and the VPN server is between the firewall and the intranet. This configuration is referred to as “VPN server behind the firewall.”

• Two firewalls are used—one between the VPN server and the intranet, and one between the VPN server and the Internet.