Motorola VT2442 - Doesn't work behind a router

Posts: 41 · Full Forum Member Joined: Apr 07, 2006 Posts: 41

1. North Potomac, Md
2. Comcast Cable
3. 284/4000
4. Motorola SB4100
5. Motorola VT2442
6. Network ie Modem---->Netgear FVS318-->Vonage Adapter-->PC

This adapter only will work when it is connected directly connected to the cable modem. Plugging it in to the FVS318 the adapter will not provision. Not sure how is supposed to work. My network has a IP scheme of 10.100.1.xxx. The VT2442 is 192.168.15.1. So if it's address is 192 etc, it doesn't seem to communicate with anything on my LAN. I cannot ping it address or anything. Changing it's WAN and LAIN address to fit my IP scheme will not allow the adapter to provision either and the power light will blink red.. Any suggestions?

Posts: 4777 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4777

Is the FVS318 set up as a DHCP server and the adapter set up to receive its IP dynamically? I believe dynamic addressing is the default for the adapter. If the FVS is not set up as a server, then you'll have to change either the FVS or the adapter.

When you say the adapter will only work when its plugged directly into the modem, I assume you mean that you get neither phone service nor internet service through the adapter when you put it behind the router? Are both phone service and internet service OK when the adapter is plugged directly into the modem? I assume that you don't want to put the FVS behind the adapter because the adapter isn't the best router in the world. Is that correct?

Posts: 41 · Full Forum Member Joined: Apr 07, 2006 Posts: 41

Is the FVS318 set up as a DHCP server and the adapter set up to receive its IP dynamically? YES

I believe dynamic addressing is the default for the adapter. If the FVS is not set up as a server, then you'll have to change either the FVS or the adapter. The FVS is a DHCP server and will give the V2442 an IP address, but it does not communicate with the Internet. I have no filters or port blocking on the router - the Tivo's would not be able to update if I did.

The VT2442 does acquire an IP address on its WAN port from my router - but I still cannot surf thru it.

When you say the adapter will only work when its plugged directly into the modem, I assume you mean that you get neither phone service nor internet service through the adapter when you put it behind the router? CORRECT.

Are both phone service and internet service OK when the adapter is plugged directly into the modem? YES

I assume that you don't want to put the FVS behind the adapter because the adapter isn't the best router in the world. Is that correct? YES.

I would use that Vonage router - but I have tried changing its LAN IP address to fit my scheme and it will not work - it will not assign it addresses at all when I do that, and you cannot even ping it or open the GUI, or telnet in over port 80. It's also out of laziness. I have a lot of devices on my network and a lot of static IP's so I know what is what:
4 Wireless AP's (3-802.11a & 1- G)
3 Tivos
1 ReadNAS storage
1 Dell CN3100 Laser printer
6 PC's
2 Macs

Pretty much everything is static IP, but anything else that plugs in will acquire an IP via DHCP. I also have a ton of services and ports that are forwarded...PPTP, IPSEC, TERMSERV, FTP, uTorret...and to recreate all that would also be a huge pain...so it would just be a whole lot easier to keep the FVS 318 in place with the IP scheme as well.

Many thanks!

Posts: 41 · Full Forum Member Joined: Apr 07, 2006 Posts: 41

Most of the time, do people trying to use Voip have to get rid of their router and replace it with the gateway provided? Do most of these units not talk to the internet behind a router. Is there a specific service, traffic, and port I could forward to the gateway to get this thing to talk to the internet?

Posts: 41 · Full Forum Member Joined: Apr 07, 2006 Posts: 41

Here's what i did to the Motorola VT2442: I turned off the NAT and Firewall and made the the LAN and WAN static IP's -with it's WAN address as the primary gateway, but also having the using a gateway address to the FVS318. I am able to access the GUI on both the LAN AND WAN IP addresses (they are different addresses). And the thing provisioned and works! So not I don't have to get rid of my router or change my IP scheme.

Thanks.

Posts: 4777 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4777

cmajewsk wrote:

Here's what i did to the Motorola VT2442: I turned off the NAT and Firewall and made the the LAN and WAN static IP's -with it's WAN address as the primary gateway, but also having the using a gateway address to the FVS318. I am able to access the GUI on both the LAN AND WAN IP addresses (they are different addresses). And the thing provisioned and works! So not I don't have to get rid of my router or change my IP scheme.

Thanks.

I'm glad you got it working- you clearly understand networking better than I do. To answer one of your earlier questions, most people don't have much trouble getting their Vonage adapter to work behind a router. I just plugged mine in. Some networks are a bit more complicated.