All, Newbie here, setting up my first system. It's intended for my General Contractor (GC) friend for his residential home remodel job site, job after job. The GC and his workers plan to self-monitor the job site. If someone arrives to steal tools at night (again), they want to be notified, then remotely view the site with phone/tablet/PC, call 911 about a burglary in process, and give info about the thieves, their vehicle, etc. I started using P2P. It was easier than opening ports, getting DDNS set up, etc. And it would be easy for the GC (and his workers) to use gDMSS to remote view. I've since educated myself of the drawbacks of P2P. Latency (varies). P2P server dependent, and the P2P outfits come and go, etc. So I thought I'd open ports and use DDNA. It seemed like an accepted and common practice. Then I heard of the VPN alternative, based on posts of @nayr . (https://www.ipcamtalk.com/showthread.php/9745-China-tried-to-login) Which led this post. Relevant details: - The GC plans to use his customer's broadband connection at the job site. eg: Comcast. This keeps internet access simple by avoiding a cellular modem. With high bandwidth for remote viewing (nice) - This "job site security system" may or may not need to co-exist with the homeowner's network. For bigger projects, the homeowner moves out when the house is "stripped down to studs". For smaller projects, the homeowner (and their home network) may stay. - The "job site security system" is an NVR, POE switch, cameras, sensors, strobes, sirens, etc. The system doesn't a PC, or valuable info worth hacking. Just camera footage. High security not necessary. - However, if I connect my "job site security system" to a customer's network, I fear I could degrade their security. ---- Comcast cable modems only support one IP device. So there's one Cat 5 cable from the cable modem to a router. ---- I will connect my "job site security system" to the homeowner's router. I could have my system use a separate subnet address than the homeowner. If that helps security. (?) Or I could use a VPN. Not because I need a VPN to keep my job site video safe from hackers. Instead, to keep the homeowner's network secure (if my NVR port forwarding exposes them to risk) (?) On the other hand.... If I use a VPN, that might add complexity for the GC and his workers? As he says, he swings a hammer for a living, and wants a remote viewing solution that is easy to use. (on a variety of devices, owned by his crew). I will check if gDMSS supports VPN, if not, we need another android app... Q: I'm convinced to ditch P2P. Should I swithc to VPN or Port Forwarding for this job site application? Thanks for your patience, I'm hooked to a fire hose and learning this stuff as fast as I can!