How To Find A Camera On Another Subnet

A common issue that you’ll face when dealing with IP cameras, VOIP devices, or really any network device is that they are often on a different subnet than you are on. For example, let’s say you bought a brand new ACTi camera that you want to use with a NVR with Geovision or Aimetis.

The default IP address for many devices is something like : 192.168.1.1

Let’s say our default subnet was 10.0.0.x and our IP address was 10.0.0.50

If you’re totally new to network jargon think of a subnet as security clearance. This isn’t strictly true, but it illustrates the idea. We need to grant you security clearance to get into the 192.168.1.x area. Currently you only have clearance for the 10.0.0.x area. If your camera is hiding out in 192.168.1.x, we have to go hunt him down.

The way we go about doing this is easy. First start by getting your IP address, subnet mask, gateway and DNS Server IP addresses. For our purposes you don’t really need to know what all these are, so maybe we’ll talk about it in a future post. For now, think of them as addresses or phone numbers. A way to reach another person, computer, etc.

The way we do this is by going to Start then typing cmd.exe. This is also reachable via Start > All Programs > Accessories > Command Prompt

Okay, so now that we’ve got our command prompt open simply type ipconfig /all in the prompt. Don’t worry about the directory you’re in, because it doesn’t matter. You should find a window that looks a lot like this (minus the colors):

LEAVE THIS WINDOW OPEN! We’ll need it later!

Okay, so what’ up with the different colors? It’s just a way to show you what to look at. A quick summary is as follows:

BLUE:

– IPv4 Address – This is your computer’s address.

– Subnet Mask – Don’t worry about it right now, but you’ll need to copy it over into another window soon, so just know what it is.

YELLOW

Default Gateway – You can think of this as the bit of the network that lets you talk to the rest of the internet. Without this, the whole opera falls apart.

RED:

DNS SERVERS –  DNS Servers turns you typing http://www.a1securitycameras.com in your browser into http://206.217.139.158, so you don’t have to.

Now that we’ve done our crash course in the command prompt, let’s find out where in Windows we need to apply these numbers.

First we need to open our Network Connections. This is easily accomplished by going to Start and then typing in Network Connections as displayed below.

Once we open that window, find the network connect you’re using to connect to the network, right click it and go to Properties:

Easy peasy right? Inside of properties we are given a list of different protocols and network options. Simply click on Internet Protocol Version 4 (TCP/IPv4) then click Properties:

Now comes the fun part. We need to change our IP address from Obtain an IP address automatically to Use the following IP address. The same needs to be done for the DNS server addresses below. This is where our previously used information comes in handy. Fill in the information as shown here:

(Click to Enlarge)

“What are we doing here?” you may be asking. Essentially we’re making this computer only accept the currently assigned IP address and then also assigning it other IP addresses in other subnets so you can see into those areas of the network. If this is being done automatically, it won’t let you do this. Hence the long blog post!

Once we’ve transferred all the IP addresses over, click on Advanced. This should bring up the following window:

We’re almost done! Click on add and then add 192.168.1.100 into the add box  and subnet 255.255.255.0:

Then click Add, OK on the TCP/IP Window, OK on the Local Area Connection window and close the Network Connections window.

At this point should be able to type in the default IP address of the camera you’re looking for and be able to access it’s options and change it’s IP address into the subnet in which you’d rather have it.

Thanks for reading! Be sure to visit our sponsor http://www.a1securitycameras.com!

 

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