Re: Opening ports for Web Cam through basic firewall

From: Robert Grabowski (RobertGrabowski_at_discussions.microsoft.com)
Date: 11/17/04


Date: Wed, 17 Nov 2004 06:40:04 -0800

We installed SBS2003 on a freshly formatted drive. The server has two NICS.
One at 192.168.16.2 (internal) and the other (external) with a fixed IP
address from our ISP served up through a cable modem running at 3072mbps. We
used all the wizards in the "To Do List" to provide the initial
configuration. We are running DHCP and DNS on the server. We are not running
Exchange Server or ISA Server. We only have 3 additional computers on the
network all configured through the //server/connectcomputer process. All are
operating properly except for the first call to //server/companyweb which
always takes at least 30 seconds the first time after boot, but works
instatntly thereafter??? There is a wireless access point configured as a
gateway that gets its reserved address from the DHCP server. The web cam has
an embedded HTTP server and its address is also reserved from the DHCP
server. It communicates through the wireless access point. It is available on
the intranet at port 80 and would be available on the extranet on port 1024
if the Microsoft routing would let it through. We can set it to use any port.
We can see it from any station on the intranet. We could see it on the
extranet while using Server 2000 with a hardware router. This means that
whether we were using a connection from the 192.168.16 range or from another
Internet connected site, we could always access the camera by calling
external NIC address:1024. All we get now is page not found errors.

Even though we specified the port for the webcam and set the internal
address for the webcam associated with the external NIC in the basic firewall
configuration, netstat -an is not showing port 1024 anywhere. What do we
need to set in SBS2003 to get the server to actually forward that port to the
webcam IP address? This is called port forwarding in our router, but I have
not found that term in the help for Microsoft routing. Is that port not
allowed in SBS2003? Do we need to select a different range? Do we need to
change any of the default Remote Access Policies? Is the blocked by something
in IIS? (Which we have also not altered.) Is there some other Microsoft
"feature" blocking this access? How do you troubleshoot a "Page not found"
message when there are no clues concerning what rejected the call?

This is a generic, out of the box, basic, unmolested installation. What else
can I tell you to help resolve this problem?

"Steve Foster [SBS MVP]" wrote:

> Robert Grabowski wrote:
>
> > Yes, the web cam gets its addresses through the DHCP on the SBS2003
> > server. Its address is reserved at 192.168.16.9. I confirmed that
> > its default gateway is the SBS2003 server, 192.168.16.2. Subnet
> > masks are all 255.255.255.0. The web cam is still not visible from
> > outside the network.
> >
> > All we want to do is simple port forwarding. I'm having a hard time
> > comprehending why Microsoft has made this so difficult under SBS2003.
> > We are very close to abandoning the Microsoft routing and returning
> > to the 2Wire hardware firewall.
>
> I promise, it's *not* difficult. There has to be something you're
> missing, or not telling us.
>
> What's your network topology? How is the SBS configured IP-wise? How do
> you connect to the internet? When you say "from outside", do you mean
> from a PC connected between your internet connection and the SBS, or
> from a completely independent internet connection?
>
> --
> Steve Foster [SBS MVP]
> ---------------------------------------
> MVPs do not work for Microsoft. Please reply only to the newsgroups.
>



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