Alainr6901

Hi, I try via Internet to link 2 QNAP NAS (TS259 and TS119) but it doesn't work. Each NAS is on different site. After copying the key the NAS is waiting approval but nothing is done on the other NAS (0 peer and nothing on invitation....) The direct link doesn't work. Is it a problem of ports? Which one should be open? Should I create a VPN between my sites? I've activated on each NAS UPNP but nothing changing.... Few month ago when I tried the 1.4 version for tests it was working.....