TL (above member) wrote about Dual NIC here: Dual NIC setup on your Blue Iris Machine
Sadly no pic on post. Found a general one on the net. "Win16 server" box would actually be your Blue Iris computer with 2 NIC ports (I had to buy a 2nd small NIC card for my PC). The point is: NIC1 connects to your router as your other PC's or whatnot connect to the router. NIC2 off Blue Iris computer heads out to a POE switch that your cameras connect to which will have a different IP scheme. Notice below, NIC1 has IP address of 192.168.0.xxx which is the IP scheme of your general network. However, NIC2 has a different IP subnet of 192.168.10.xxx . This *should* prevent anything after your Blue Iris computer from getting to the internet...and "should" prevent anyone from getting into your individual cameras.
This is, of course, if not using VLAN technology which I have no experience about
Sadly no pic on post. Found a general one on the net. "Win16 server" box would actually be your Blue Iris computer with 2 NIC ports (I had to buy a 2nd small NIC card for my PC). The point is: NIC1 connects to your router as your other PC's or whatnot connect to the router. NIC2 off Blue Iris computer heads out to a POE switch that your cameras connect to which will have a different IP scheme. Notice below, NIC1 has IP address of 192.168.0.xxx which is the IP scheme of your general network. However, NIC2 has a different IP subnet of 192.168.10.xxx . This *should* prevent anything after your Blue Iris computer from getting to the internet...and "should" prevent anyone from getting into your individual cameras.
This is, of course, if not using VLAN technology which I have no experience about