D-Link DIR-625 and Linksys RT31P2 Config issues

Posts: 7 · New Forum Member Joined: Oct 24, 2006 Posts: 7

Hi Folks,

I have made 6 separate phone calls to Vonage tech support now with absolutely no success. Not only did they only read the script in front of them on their screen but the communication skills were pretty bad. I am really hoping you all can help me out. For the most part my Vonage is working well. I can make outbound calls and the sound quality is just fine. It is the inbound calls that I have issues with. The phone will ring once and then disconnect the person calling and will never make it to voicemail. I know it sounds like an inbound port issue. Let me describe my setup for you here.

Comcast Cablemodem ISP with Motorola Cablemodem box
D-Link DIR-625 Wireless Router connects to cable modem and gets my external IP.
DIR-625 hosts the DHCP service with IP Range of 192.168.0.100-200.
Some things such as my RT31P2 and Xbox 360 (which works fine) have hard coded IPs. The Vonage box is at 192.168.0.20. DHCP is turned off on the Vonage box.
In the DIR-625 I have port forwarding setup to the Vonage box. The ports are 21,53,69,80,123,2400,5061 UDP in one line and 10000-20000 UDP on a separate port forwarding line.

Now, based on what I understand from portforwarding.com etc etc this should work correct? The inbound ports listed above should now be forwarding to the Vonage Box ip address correct?

Now this is what gets me. When I have the cat5 cable plugged in from my DIR-625 to the internet port on the RT31P2 I can ping the Vonage box by IP address but I can not make any calls. No dialtone. BUT, if I plug the cat5 from the DIR-625 into a hub port on the RT31P2 I can make outgoing calls but I can't ping the 192.168.0.20 IP address assigned to the Vonage box which leads me to believe that of course the port forwarding will never work.

Ideas? What the heck am I doing wrong here?

Any help would be greatly appreciated.

Posts: 142 · Posted: Tue Oct 24, 2006 1:11 pm Post subject:

Can't you turn on the DMZ for 192.168.0.20?

Posts: 7 · New Forum Member Joined: Oct 24, 2006 Posts: 7

Unfortunately no. I am a remote worker for my job and already am using the DMZ feature for work related stuff.

Posts: 142 · Posted: Tue Oct 24, 2006 1:40 pm Post subject:

Looks like in my experience, DHCP won't accept ping requests going to 192.168.0.20...

Can you let DHCP assign the IP address for your RT31P2? Your RT31P2 must have Dynamic IP turned on in order for it to work.

Posts: 7 · New Forum Member Joined: Oct 24, 2006 Posts: 7

I guess I can try it but what will I get from a Dynamically assigned IP that I won't from a static IP?

Posts: 142 · Posted: Tue Oct 24, 2006 2:04 pm Post subject:

Well, if you have setup the RT31P2 as a dynamic IP address and connect it to a cable modem, it should work.

Assuming that the cable modem acts as a DHCP Server, the cable modem just gives you the dynamically assigned IP address to whether you connect it to your DIR-625 or RT31P2. When you plug the cable modem to your RT31P2, you have to unplug/turn off your modem and plug it back in so that it can detect your RT31P2.

Posts: 7 · New Forum Member Joined: Oct 24, 2006 Posts: 7

This won't work. When I put the RT31P2 between the cablemodem and the wireless router my ping response times skyrise to over 3000 ms. I also end up loosing my DMZ usage and several other port forwarding and QOS settings that I need for work. The cablemodem is not doing any DHCP. It does a lousy job of it and is not very configurable. That is why I have the D-Link DIR-625 doing the work.

SO basically, I need to find out how to get this port forwarding working properly because it is my only real option.

GraysonPeddie wrote:

Well, if you have setup the RT31P2 as a dynamic IP address and connect it to a cable modem, it should work.

Assuming that the cable modem acts as a DHCP Server, the cable modem just gives you the dynamically assigned IP address to whether you connect it to your DIR-625 or RT31P2. When you plug the cable modem to your RT31P2, you have to unplug/turn off your modem and plug it back in so that it can detect your RT31P2.