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Is Time Warner accessing my IP security cam?

D

darkmud

Junior Member
First of all I know this sounds crazy...there must be something I'm misunderstanding with this. Here's a quick summary: Time Warner recently upgraded my cable modem. I can no longer access my network cameras remotely so I was trying to troubleshoot so I didn't have to call support. I have a Netgear Nighthawk R700 btw that is configured to forward ports and I'm using DynDNS...everything was working fine prior to them swapping out the modem.

Ok so here's where my knowledge of networking is failing me: My router is 192.168.1.1 and this particular camera is 192.168.1.203. The Time Warner cable box is 192.168.0.1. When I went to 192.168.0.2 I was greeted with the logon screen of the security camera...the one with the IP address 192.168.1.203.

Why is my camera accessible at an address outside the 192.168.1.x range? I can access the logon page at both 192.168.1.203 and 192.168.0.2 which seems very odd to me.
 
Sounds like your cable modem also has some routing functionality built into it. Are you able to access 192.168.0.1 and access a configuration page where you can do things like disable the DHCP router? Would need more information like the make & model of the cable modem to go further though.
 
The make/model of the cable modem is: Arris/Model TG862G

As for accessing the cable modem they did not give me a password (I wasn't home during the install unfortunately) and it doesn't have one listed on the side of it. I am able to get to the login page however. I do know that the installer turned off the modems Wifi since he saw that I had my own Wifi.

My Netgear router is assigning static IP addresses for the cameras but I remember bypassing that for a couple cameras and manually assigned them in the camera itself. Even if the cable modem has DHCP would it assign its own address for the camera?

When I get home I'll check to see if the camera is setup to have a manual static IP or if it is pointing to my Netgear router to get a static address from DHCP. Maybe that matters for some reason?
 
Your new "modem" is actually a combination modem and router. That new modem/router is assigning the IP address 192.168.0.2 to the WAN port of your Netgear router. So when you try to go to 192.168.0.2, the Netgear recognizes that as an incoming connection from "outside" the network (since that is the external/WAN port of the Netgear) and it then forwards that request on to the camera, just as it should. To enable access to that camera from locations outside of your home, log in to the Arris router (use the IP address 192.168.0.1, user name "admin" and password "password", assuming that the defaults have not been changed) and then either set it to BRIDGED mode so it will only act as a modem, or leave it as a router and forward the ports that you need for your camera to the 192.168.0.2 IP address.
 
You probably had before a Bridge Modem only.

Now you have a Modem/Router (Arris/Model TG862G) and a Netgear Router.

Quote:"Is Time Warner accessing my IP security cam?".

The Good news is that Time Warner can not Access your Network with Double Routing.

So the new arrangement is good to eliminate Paranoiac ideation. :colbert: - :thumbsup: - 😉 - :biggrin:

The bad News is that double NAT is Big trouble for Home Network.

The most common solution is to configure the Netgear as a access Point with a switch,

Like this - Using Wireless Routers (or Modem/Wireless Router) as a Switch with an Access Point - http://www.ezlan.net/router_AP.html


There are other solutions but they would need more Home work understanding better networking.



😎
 
Yes you are exactly right my previous modem was a Bridge only. Now it appears they gave me this all-in-one modem that I didn't want or need.

I was able to access the new modem using the default password (password) and the installer turned off wireless but did not turn off DHCP. I don't know how it works having 2 DHCP servers but that MUST be the reason for the camera showing up twice right? It's still strange that even though the camera is pointing to my Netgear router for DHCP that the cable modem still assigns it an address.

--Edit: I didn't see Fardringle's post when I wrote this but now I see the basics of how the the Netgear router responded to 192.168.0.2. With that said I don't understand it completely but will search about it and learn more. Out of all the cameras I'm wondering why it chose that specific one?

It seems I need to put the modem in Bridge mode. That way I can use my Netgear router the same was as before with port forwarding and everything else so I can access my cameras. I definitely don't want to use the cable modem to forward my ports and/or to handle any of the DHCP.

So if this is true it looks like I can take off my tinfoil hat 😛
 
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If the cable modem is set in bridge mode, it would hand out of WAN IP address to your netgear router. However, since it is in ROUTING mode, it is handing a LAN address from it's DHCP tables to the Netgear router.

So it is a double NAT situation. I'd imagine that the cable modem somewhere in the admin page has the option to set it in to bridge mode, and thus you'll get an actual WAN IP address assigned to your Netgear router (IE no double NAT).

You'll start getting something like 104.10.26.x or whatever instead of 192.168.0.2, which is a reserved/home IP address (192.168 /16 block).
 
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