Hi
I found that hairpin loopback NAT ( LAN-WAN-LAN ) for 2nd WAN on Draytek 2830Vn ( Vigor120 via 2nd WAN ) doesn't allow incoming traffic for port forwards , only works while WAN 1 is down / offline
I use WAN 1 for Web and email server while using Wan 2 for security cameras etc via iphone app
Thanks