Yes, you can access daap as easy as typing an url in your browser.
However, most clients only support DAAP only by ‘discovery’.
Discovery usually happens through broadcast on the local network.
However, when remote, the broadcast won’t work. You’ll have to ‘force’ the discovery. Using a SSH tunnel ‘forces’ discovery of firefly(DAAP) on your system.
If the firefly address is given, you can directly call it from the client. Even if it’s remote. I used a similar way when developing DaapPlaylistGenerator.
It connects to a given address (whether it’s remote or local, doesn’t matter) and processes all daap requests/responses.