RT31P2 behind linux router

Posts: 11 · Vonage Forum Associate Joined: May 17, 2005 Posts: 11

Ok I just got my vonage package and have the phone working fine behind my linux router, but I have a couple of questions.

1. Is it possible to make use of the ports on the RT31P2 in this setup? I have set the wan IP of it to a IP on the same segment as my internal network.

2. Is it possible to access the RT31P2 website without pluging into one of the lan ports?

A little more info... I can, if connected to a lan port on the RT31P2 connect to its website, but not hit the web or anything else on my local network. This is with both my linux defualt gateway and the lan ip of the RT31P2.

Any ideas? Is there a way to make it more like a switch or access point rather than a router?

Thanks,
Kyle

Posts: 3198 · Posted: Tue May 17, 2005 4:22 pm Post subject:

you're using linux as a router or what?
1. you aren't using dhcp?
2. yes turn remote administration on

Posts: 11 · Vonage Forum Associate Joined: May 17, 2005 Posts: 11

yes i am using linux as a router.

No I am not using DHCP.

I will try it...

Thx

reebok wrote:

you're using linux as a router or what?
1. you aren't using dhcp?
2. yes turn remote administration on

Posts: 3198 · Posted: Tue May 17, 2005 4:32 pm Post subject:

I'm not familiar with software routers but hooking up an rt31p2 behind another router is usually plug n play. some say disable dhcp on the rt31p2 but mine works fine with it on. the first router assigns an ip to the rt31p2 and the rt31p2 assigns ip's to the computers behind it. it would probably make a difference if you had computers connected to both routers and wanted them to all talk to eachother, since obviously you would need them all on the same subnet.

Posts: 11 · Vonage Forum Associate Joined: May 17, 2005 Posts: 11

Ok now the voip works fine, and I can access the admin website, but I can not get PCs on the lan of the rt31p2 to work on my local network. Still working on that one....

reebok wrote:

I'm not familiar with software routers but hooking up an rt31p2 behind another router is usually plug n play. some say disable dhcp on the rt31p2 but mine works fine with it on. the first router assigns an ip to the rt31p2 and the rt31p2 assigns ip's to the computers behind it. it would probably make a difference if you had computers connected to both routers and wanted them to all talk to eachother, since obviously you would need them all on the same subnet.

Posts: 3198 · Posted: Tue May 17, 2005 4:38 pm Post subject:

dhcp on the rt31p2 needs to be off. the linux box should be assigning ip's to all computers. they all need to be on the same subnet.

Posts: 646 · Posted: Tue May 17, 2005 4:42 pm Post subject:

If you only need to use one of the LAN ports on the RT31P2, then you can try connecting one LAN port back into the WAN port, and another LAN port into the rest of your network.

If that doesn't do what you want, then you'll have to divide the network into 2 different subnets. For example, the WAN side of the RT31P2 (which includes the Linux box and the rest of your network) can be 192.168.0.0/24, and the LAN side can be 192.168.15.0/24. Then anything plugged into the LAN ports will get double-NATed on the way out to the Internet, which is kinda weird.

If you're feeling adventurous, you might be able to disable NAT on the RT31P2, and use some static routes to hold the two subnets together. I don't know exactly how you'd go about doing that...

If you want to access the RT31P2's config page from the WAN port, then enable the remote administration. That should be safe, as long as the WAN port is only facing the rest of your LAN.

Posts: 25 · Vonage Forum Junior Joined: May 12, 2005 Posts: 25

I'm having a similiar issue.

I have a Linux Smoothwall firewall that my cable modem connects to.

From there, I have a DMZ with just the RT31P2. The NIC on the firewall connects to the RT's internet port.

Another NIC on the firewall connects to a Linksys BEFW11S4, which has my PC and webserver.

I'm not able to remote to the RT31P2 (WAN IP 192.168.2.4, Local IP 192.168.2.2) from my PC (IP is DHCP from the firewall, 192.168.1.100) I have enabled remote administration via port 8080. If I plug directly into the RT and change the PC's address to 192.168.2.5, then it's fine. However, then I can't browse out to the internet.

It's not a problem switching the cable back and forth, but I would like to be able to browse from the RT so that I can do a VoIP speed test. I have setup QoS on the Linux Firewall and would like to verify it's working.

Posts: 646 · Posted: Wed May 18, 2005 2:45 pm Post subject:

Finkster68 wrote:

I have a Linux Smoothwall firewall that my cable modem connects to.

I'm not able to remote to the RT31P2 (WAN IP 192.168.2.4, Local IP 192.168.2.2) from my PC (IP is DHCP from the firewall, 192.168.1.100) I have enabled remote administration via port 8080. If I plug directly into the RT and change the PC's address to 192.168.2.5, then it's fine. However, then I can't browse out to the internet.

Try forwarding a port in smoothwall:

External Source IP: 192.168.1.0/24
Source Port: 80
Destination IP: 192.168.2.4
Destination Port: 80

If that works, then you should also check to make sure that people connecting from the Red interface can't see your config page.

Posts: 25 · Vonage Forum Junior Joined: May 12, 2005 Posts: 25

Unless I miss-read something in the documentation, I'll double check, I thought that devices on the Green interface (Private network) would be able to access devices on the Orange (DMZ) Interface.

From what I can tell, there's not way to forward ports, through the Smoothwall GUI, from the Green to the Orange.

Also, I assume that because the RT31P2 is only connected via it's internet port, that's why I can't access the local IP address of it.

I'm more stumped on the why when I move my PC's connection to the RT31P2, I can't get out to the internet.