A while back I suddenly noticed that I was not able to connect to my NAS (QNAP T419P) using AFP, even though AFP is activated on the NAS. I have Mac OSX 10.9.5 (Mavericks). I'm also not able to browse the default folders on the NAS (Public, QWeb, QMultimedia etc.) from Finder, only my own created folders, even though permission is correctly set on the NAS.
My NAS has FW v. 4.0.2.