When should this be used?
Is there an easy software way for a customer to setup a secure link?
Is there a way we can get a VPN tunnel setup on the traffic between our primary data center in New York and your facilities without a dedicated line? We're going to be pushing our profile data over and I'd prefer to have it encrypted.
At the moment we don't have a hardware VPN solution that we could use for this.
Older software: http://www.openswan.org/
More recent development: http://openvpn.net/