assuming that your wan interface is ETH03 , and the dvr is 192.168.10.2 , and is listening on 80 tcp try this
and from the internet , type your.fqdn:8082
I tried this one but didn’t work. I am using 3 WAN connections. The static IP is on Eth3 (relates to ppp2) so I tired all the options e.g – Eth3, PPP2 and ANY as input interface but it’s not working. Still error – page not found and if I don’t specify the port in web address it goes to Zeroshell login page.
And one more thing my DVR IP (local IP on which PC DVR is running) is on static modem in Balancing rules.