Re: Webcam with SBS-2003


Dave wrote:
Sorry if this is answered somewhere else in this group but I have been
reading for some time now and haven¡¦t seen anything that comes close
enough to this issue. I have a client with SBS-2003, 5 XP machines
and a Canon BV-C50ir webcam in their network. The webcam was
accessible from the internet. Their prior network guy suddenly died
and didn¡¦t believe in network documentation, go figure. So here I am
trying to figure out what exactly is going on within their network.

They were having issues with their previous ISP (high speed DSL @ a
whopping 17k upload speed) which the former ISP said nothing was
wrong! So I had them change ISP¡¦s to Centurytel 10Mb DSL. Centurytel
sent them a Westell 327W router and assigned them two public IP¡¦s. I
used one of the public IP¡¦s on the outside of the router so it can be
accessed from the internet and the other is still free. Ok, so far?
Everything is working from the client computers with regard to
internet access accept the webcam. The webcam functioned fine from
the internet prior to the switch of ISP¡¦s and router. To the best of
my knowledge everything is setup exactly the same as before the change
of ISP. I have gone round and around with Centurytel over the router
and they don¡¦t seem to get it. They told me it is an issue with the
camera, which is working fine from inside the network if it is
configured @ 192.168.1.100.

So here is the configuration;

Internet to router „³ public IP
Router 192.168.0.1 to first NIC 192.168.0.2 (255.255.255.0 subnet on
both)
Second NIC 192.168.1.20 again subnet 255.255.255.0
DHCP 192.168.1.140 to 192.168.1.254 subnet 255.255.255.0 gateway
192.168.1.20

Camera 192.168.2.245 subnet 255.255.255.0

SBS-2003 Services are setup with
Camera port 83
Video port 65310
Camera control port 65311

Westell 327W Port forwarding
83 on 192.168.0.2
65310 on 192.168.0.2
65311 on 192.168.0.2

Am I missing something here? Could the issue be with the Westell
router? Sorry for the long post, I¡¦m just hoping to be descriptive
enough for you to get a good understanding of the layout.


Nearly. Where is the camera physically connected, and what provision is made for routing to it? Something with a network address of 192.168.2. can be physically connected to any network, but nothing on networks 192.168.0. or 192.168.1. will be able to talk to it unless a router is specifically programmed to route to and from it.

There's a piece of the jigsaw missing, as to how this was done previously, and as the missing part of the network is the old router, that has to be where the finger points first. Typically, multiple networks share the same wires and some computers by giving the NICs in those computers multiple IP addresses, in the different networks, and then setting up routing between them. While this isn't rocket science, it's well beyond the expected SBS scenarios. If the SBS NICs are given additional IP addresses, I'd expect the next run of the CEICW to wipe them out, but it's not something I've tried.

It's not obvious why a third network address is needed. My preference would be to connect the camera to the 192.168.0. network with a 192.168.0.xx address. (And by the way, 192.168.0. and 192.168.1. networks should really be avoided, as VPN may be used at a future date, and these two networks are very common defaults in many places. VPN-connected networks must all be different.) You then forward the desired ports directly to it, there should be no reason for it to be reached through the SBS. Both internal and external clients should be able to see it. I'm also personally not keen on third-party IP products being reachable from the Internet while sitting in a business LAN, but that's just me being paranoid.
.

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