VPN on another ip than the on of the physical interface

[jgarreau]

Hello,

I would like to configure a vpn tunnel but I have one obligation. My custommer ask me to use another public ip than the one configured on the interface. The goal is to be able to migrate easily this vpn in the future because they can ask to their provider to move one public ip from a site to another site.

Is this possible ? if yes how ?

Every help will be much appreciated.

Best regards,