blocked external ips

Since I have been playing a bit with pptpd and openvpn, my nas is blocking my external connections. I used transmission remote on my work or phone but it suddenly stopped working. The port forwards from my modem work fine (for my other server), but the nas is refusing all external connections. Hosts.allow and deny are empty? and the settings.json from transmission daemon are set up correctly. Any idea how to fix this? Or a way to go back to all default settings without data loss?