I'm trying to configure Serv-U to run in passive mode behind a Cisco ASA 5505. What is the proper way to do this?

A client has an Aironet 1200 AP and currently they have Radius set up to allow Microsoft domain users access to the LAN. They now want to set up public access to the internet for guests as well.Our initial thought was to set up another SSID and ACL t...