Please follow the steps outlined below to configure
Virtual Private Networking (VPN)
Create Certificates. Under the CA section generate the
certificates for the Certification Authority (CA) and other parties
required for the VPN configuration.
IPSec configuration.
Copy Certificates. Copy the certificates from your
Certification Authority to your local Linux station... unless you
already are the Certification Authority.
Configure Tunneling. Go to the Tunnels sub-section under the
Firewall Rules section for more details on this.
Restart the IPSec service.
More Information
Configuring ipsec Tunnel between freeswan and Windows XP/2000: http://www.natecarlson.com/linux/ipsec-x509.php
Windows 2000 / Windows XP - Freeswan VPN: http://vpn.ebootis.de