I was at a clients house were I have 12 cameras and using milestone for NVR. The only port I have opened up was for the milestone 8081 and I was looking at their xfinity xfi account which has mild firewall and it showed about 100 attempts to access some of the Hikvision cameras remotely from all kinds of countries but I'm trying to figure out how if the ports aren't open. I read their was a backdoor to these cameras but still without ports being open I'm wondering how they are doing it. I'm sure some of these are blackmarket china versions so I'm assuming they have something built in that is advertising it. Anyone else seen this?