Ok, so i managed to portforward on my isp router, and also enabled portforwarding (virtual server) on my router (TP-Link) TL-WR1043ND, i can now access my dns 320l, but it only works for the configuration page of the NAS, so if i type poramor.dlinkddns.com i end up on the login page of the sharecenter, supposedly typing poramor.dlingddns.com:83 should end up on joomla page, since i already followed a tutorial for changing joomla port to 83, and it was previously working on LAN, now it does not work either way =( maybe i'm still missing something, got the same issue for owncloud, but will ask there in order not to mess up posts.