[otrs] Surveytool

Hi, I would like to start using the survey tool. I understood from previous posts that at the moment it is limited to one survey only. This also probably means that, when set to valid, this survey will be used for all queues in the system? The problem is that the module sends out a link to the customer (does anyone know the URL?) and my box is running behind a firewall. I'd prefer to restrict outside access to the box. Can this be done in another way (by putting the survey page on the webserver)? Regards, Arnold.