Bridging 2 Routers (1 internet, other local network)

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djmorice

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Apr 8, 2015
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I have a weird system setup for a windows based computer that is used solely for CCTV operation. I have a router that connects to all of my IP cameras, and the computer that has the CCTV software on it. That router isn't connected to the internet in any way and that's how I'd like it to remain for multiple reasons (mainly don't want employees on the internet while they should be watching the cameras).

The problem I have is that sometimes I need to do some remote maintenance on these terminals. So I have a USB wifi adapter that they could just pop in to the computer and connect to the internet. Then I could connect and do the maintenance I need.

The problem comes when they switch connections. If they are connected to the wifi connection then all the camera feeds go down because I'm no longer connected to the other local network.

So would bridging the two connections work where I could connect to the computer over the internet, but also still access the camera feeds on the other separate local network.

TIA
 
Solution
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You should be able to use both networks at the same time. You need of course to be sure the subnets are different on the 2 network.

Since your camera network does not need to get the internet make sure the DHCP server leaves the gateway field blank. If you manually configure the ip then you just leave the gateway blank. When you attach a wireless USB it will learn another IP subnet from the main router as well as the default route. At that point it you should have access to both networks
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bill001g

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Aug 9, 2012
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You should be able to use both networks at the same time. You need of course to be sure the subnets are different on the 2 network.

Since your camera network does not need to get the internet make sure the DHCP server leaves the gateway field blank. If you manually configure the ip then you just leave the gateway blank. When you attach a wireless USB it will learn another IP subnet from the main router as well as the default route. At that point it you should have access to both networks
 
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djmorice

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Apr 8, 2015
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hmmm ok. So I don't need to bridge the connections inside windows networking, just have different subnets and they should both work?
 
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bill001g

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It is that simple.

Even simpler you could put them all on the main network and just not put in the default gateway and they would not know how to get to the internet. You could then have them put in the gateway when you needed access. Much simpler but you must trust people to not put the gateway in when it isn't needed.
 
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djmorice

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Apr 8, 2015
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Ok so I changed the subnet mask on my wired router connection and left it the same on my wifi connection. When I plug in my ethernet cable, I lose the internet connection from the wifi adapter. Here is a screen shot of the ipconfig for both adapters. Any thoughts?

kF3iNtX.jpg


imgur link
 
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