Topic: Multiple IP addresses and routing

[troykd]

Hi,
I have a Polycom Webcam for use with teleconferencing for our business.  Apparently, it needs it's own external IP for the training instructors to view our room.  So, we need two IP addresses.  One for the SME Server and one for the cam.  Can SME route an additional IP to the cam at a static LAN address?

Do I use IP Tables to do this?  If so how?

Thanks

[Normando]

Yes, you can.
Use Port Redirection in server-manager.
For example, you have set the webcam to use IP 192.168.0.30 with port 1234. Then, you have redirect any port (1234 or whatever you want) external request to internal IP 192.168.0.30 port 1234.

[CharlieBrady]

I have a Polycom Webcam for use with teleconferencing for our business.  Apparently, it needs it's own external IP for the training instructors to view our room.  So, we need to IP addresses.  One for the SME Server and one for the cam.  Can SME route an additional IP to the cam at a static LAN address?

No, not without significant modification. Moreover, ISPs will rarely allocate you more than one address, so the capability probably wouldn't be useful to you anyway.

[Normando]

Well, sorry, I re-read your post, and you can redirect only ports to one LAN IP, but always you have only one external IP.

Can you setup your eabcam with a loacl IP and a port?
If you can, then you can access outside your LAN.

[troykd]

No, not without significant modification. Moreover, ISPs will rarely allocate you more than one address, so the capability probably wouldn't be useful to you anyway.

Cox will give me a second IP for $5 a month.  As far as usefulness, the IP is a requirement for using this webcam, so I don't see how it wouldn't be useful.  I guess SME can't handle the two IP's.  I'm told it's no problem with a Windows Server.

[mmccarn]

Any Polycom firmware newer than 2 - 3 years old should also support 'NAT' which is not usually do-able with H.323 connections.

However, if you have the newer firmware, you need to setup 'NAT' on the polycom, restrict the range of ports on the polycom, specify your SME's external IP in the field provided for 'external ip', then port-forward all of the ports necessary from the SME to the Polycom (the range mentioned above plus some other ports)

Or, put a router in front of the SME, make the Polycom the 'DMZ', but send the ports you want to the SME (http, https, imaps, pop3s, smtp, smtps).  You'll still need to configure the NAT functionality in the polycom itself.

Here is a microsoft howto on accessing a polycom behind Microsoft ISA - just substitute 'SME' whereever you see 'ISA': http://support.microsoft.com/kb/556039.  (You don't need to create any 'outbound' rules - SME allows all outbound traffic by default).

[jameswilson]

Yuo could use vm ware and another sme, or use a router as your modem without nat then you wont need to go through the server at all for the cam. But cant see why you cant use vpn or a differnt port for it.

[troykd]

Any Polycom firmware newer than 2 - 3 years old should also support 'NAT' which is not usually do-able with H.323 connections.

However, if you have the newer firmware, you need to setup 'NAT' on the polycom, restrict the range of ports on the polycom, specify your SME's external IP in the field provided for 'external ip', then port-forward all of the ports necessary from the SME to the Polycom (the range mentioned above plus some other ports)

Or, put a router in front of the SME, make the Polycom the 'DMZ', but send the ports you want to the SME (http, https, imaps, pop3s, smtp, smtps).  You'll still need to configure the NAT functionality in the polycom itself.

Here is a microsoft howto on accessing a polycom behind Microsoft ISA - just substitute 'SME' whereever you see 'ISA': http://support.microsoft.com/kb/556039.  (You don't need to create any 'outbound' rules - SME allows all outbound traffic by default).

Thanks so much. They are using h.323 so I think the router in front of the SME with the DMZ is the simplest way to go. I'll give it a go and let you know how it went.

Thanks again