The AirSync protocol works over the HTTP protocol, using the HTTP User Module. Open the HTTP User Module settings, and find the Sub-Protocols panel:
Use the AIRSYNC Log Level setting to specify the type of information the AirSync module should put in the Server Log.
The AirSync module records in the System Log are marked with the AIRSYNC tag.
The Access setting specifies who can access the AirSync service.
Note: Many AirSync clients are designed to access only the standard HTTP ports (port 80 for clear-text connections and port 443 for secure connections), make sure your HTTP User module is properly configured to accept connections on these ports.