Figment

Hope someone can help before I tear out what little hair I have left.

The problem is this:

When I try to use my webcam for video conferencing in Windows Messenger, connecting via router and Cable Modem, I cannot send or receive video or audio. The same is true if I try to use any of the other resource sharing options (Remote Assistance, Whiteboard etc.)

By entering the port range 1027-65535 into the routers port option page, and point them at my PC, I can send video/audio but not receive.

If I connect using DUN, everything works as I would expect.

Ditto If I connect via CM, direct to the net.

If it makes any difference, I am using WinXP Pro, Messenger 4.6.076, Netgear RP114 Router, Surfboard 3100 C/M, Logitech 3000Pro Webcam

Thanks in advance for any help

dsmith

the video and audio bits use H323. It sounds like your router's implementation of NAT doesn't support it. (There's more to it than the simple NAT needed for browsing etc.)

What model/make router is it ?

Deano

Figment

Netgear RP114

Jeff Wiltshire

The Netgear router will have a thing called SUA which allows you to send all incoming packets to a default internal IP address. This should fix your problem but.....it does open the machine you specify to attack so I would suggest that you install some form of Firewall (Zonealarm, Black ICE etc) on this device.


Jeff

Figment

Is the SUA the same thing as DZM?

If so, I have tried setting the default DZM to the IP of my machine, but this has no effect.

Jeff Wiltshire

Figment

Normally Netgear routers have Single User Access (SUA) but I'm not sure if the RP114 has it. Have a look in the help files that came on the Netgear CD...


Jeff

Jeff Wiltshire

Figment

Looking at the RP114 manual....

5-6 Advanced Configuration of the Router
Although the router causes your entire local network to appear as a single machine to the Internet, you can make local servers for different services (for example, FTP or HTTP) visible and available to the Internet. This is done using the PORTS menu. From the Main Menu of the browser interface, under Advanced, click on PORTS to view the port forwarding screen, shown in
Requested services are identified by port numbers in an incoming IP packet. For example, a packet that is sent to the external IP address of your router and destined for port number 80 is an HTTP
(Web server) request, and port 21 is an FTP request. Examples of port numbers are shown at the top of the PORTS menu, although you are not limited to these choices. See IETF RFC1700, “Assigned Numbers,” for port numbers for common protocols..
Note: Many residential broadband ISP accounts do not allow you to run any server processes (such as a Web or FTP server) from your location. Your ISP may periodically check for servers and may suspend your account if it discovers any active services at
your location. If you are unsure, refer to the Acceptable Use Policy of your ISP.
Reference Guide for the Model RP114 Web Safe Router
Use the PORTS menu to configure the router to forward incoming protocols to IP addresses on
your local network based on the port number. In addition to servers for specific protocols, you can
also specify a Default (also called DMZ) Server to which all other incoming protocols are
forwarded. To configure port forwarding to a local server:
1. Enter a port number in an unused Start Port box.
2. To forward only one port, enter it again in the End Port box. To specify a range of ports, enter
the last port to be forwarded in the End Port box.
3. Enter the IP address of the local server in the corresponding Server IP Address box.
4. Click Apply at the bottom of the menu.


You need to set a default (ie any service or protocol) to the address of the machine you want to use for Web Cam etc.


Jeff

Figment

Jeff,

I've tried all of that, but the best I can manage is being able to send video and audio out, but I cannot receive the other parties video/audio. If I bypass the router, everything works fine.

Figment

Oh and I meant DMZ in the earlier post, not DZM (D'oh)


Thanks

Jeff Wiltshire

Figment

I've just re-read your orginal post.

You need to set the default (ie everything inbound) to your PC...

Is that what you've done.


Jeff

Figment

Yes, but I am having very little luck, and have tried changing so many settings that I'm about to do a factory reset and start over

Figment

bttt cos still no joy

Jeff Wiltshire

Do you have access to the Cable Modem (admin access)?

It sounds as if the Cable Modem is doing NAT as well. What is the external address of the Netgear router (ie is it 10.x.x.x, 172.16.x.x or 192.168.x.x). If the Cable Modem is Nating as well you'll need to see if the Modem is capable of sending all inbound packets to the router.


Jeff

Figment

External address of router is 62.255.x.x, which is the same IP range allocated by the ISP to LAN card when I bypass the router.

Jeff Wiltshire

Local Game Host or Videoconference Example
Some online games and videoconferencing applications are incompatible with NAT. The Model RP114 router is programmed to recognize some of these applications and to work properly with them, but there are other applications that may not function well. In some cases, one local PC can run the application properly if that PC’s IP address is entered as the default in
the PORTS Menu. If one local PC acts as a game or videoconference host, enter its IP address as the default.

This is from the Netgear Manual....

There is a new version of code for this device which yiu should check out. However point the default Ports entry to the specific PC 'should' get it working.

Don't really know what else to suggest.

Sorry

Jeff

Figment

OK thanks for all your input Jeff.

I had read all of that in the manual and (thought) I had followed it to the letter, but it still would not work for me.

According to their support site, I have the latest firmware code available. Suppose its time to raise a support ticket to see what they have to say.

Thanks again.

IanW

I have gone through with Figment the standard H323 ports for net meeting, but its the dynamic ones that it uses too that i think its having problems with.

Edited as i cant spell!

[Edited by IanW - 3/6/2002 11:40:27 PM]