[Solved] Port forwarding with Technicolor TC7200 and Linksys WRT54G

SanskritFritz · 2014-10-11 17:53:58

I have two routers connected serially: the Technicolor TC7200 acts as a modem, and the Linksys WRT54G is my router. I know I could use the Technicolor as my router as well, but I simply like the Linksys much better, especially with Tomato firmware. So I have a set up like so: the Technicolor router socket "4" is connected to the "Internet" socket of the Linksys router which in turn serves my desktop computer and a laptop and the wifi. I want to forward port 22 to my destop box from outside. On the Linksys, port forwarding is fairly easy, it goes like this: http://imgur.com/fpEaO5c . But I'm not sure about the Technicolor one, as it doesn't see the Linksys router, it can't even ping it. However everything works well otherwise, all computers are connected to the internet, wifi works well. Why can't I forward port 22 from the Technicolor router to the Linksys router? Why can't the Technicolor router ping the other one? Should I connect them differently?

Last edited by SanskritFritz (2014-10-14 20:39:04)

SanskritFritz · 2014-10-14 07:48:01

Can it be because the Linksys router expects input from a modem, and doesn't act like a normal client computer? Is there a way to bypass the router part in the Technicolor modem entirelly?

ewaller · 2014-10-14 16:06:07

If you have cascaded the routers using the "Internet" connection of the WRT54G, then you really have two networks. The WRT54G will (presumably) obtain a 192.158.x.y address from the Technicolor router. In turn, the Technicolor router obtains its routeable address from your ISP. If the WRT54G is using the same subnet number as is the Technicolor, then, yes, you won't be able to see the Technicolor router through the WRT54G. For example, assume that for the network consisting of the two routers, the Technicolor has selected 192.168.1.1 for itself, and has assigned 192.168.1.2 to the WRT54G. Then, consider the network consisting of the desktop, the laptop, and the WRT54G. The WRT probably assigned itself 192.168.1.1 on that that network and, for arguments sake, 192.168.1.2 to the laptop and 192.168.1.3 to the desktop. Either of those computers can talk to the WRT54G at 192.168.1.1, and no packets will be sent upstream.

There are two things you can do. The first is to ensure that the WRT54G is using a different subnet than is the Technicolor. If the Technicolor uses 192.168.1.x, then configure the WRT54G to use 192.168.0.x. Then, computers your computers can talk to the WRT54G on 192,168,0,1, and to the Technicolor at 192.168.1.1. The other thing you could do is to configure the WRT54G to not act as subnet controller, but to act as a bridge. I don't know the Tomato firmware, but the DD-WRT firmware I use can be set up to act as a bridge. In this case, there is only one network. All packets arriving at the WRT54G get passed up to the Technicolor. This might defeat the point of running the WRT54G in the first place. This mode is usually used to provide two access points in different parts of a building on one network.

SanskritFritz · 2014-10-14 20:01:22

Thanks ewaller. I forgot to mention the IP addresses:
Technicolor 192.168.0.1
Linksys 192.168.1.1
So essentially they are configured as you suggested, and both routers are visible from the client machines through the Linksys. Network is working well, the only problem is the port forwarding. I've read searched and found that I should set the Technicolor into bridge mode, but apparently that option is missing here

SanskritFritz · 2014-10-14 20:38:26

Hey, I mark this thread as solved. I did a reset on the Technicolor modem, switched the cable to socket 1 and suddenly it sees the Linksys router, although with a different IP address, but the MAC address is correct. So I've set up the port forwarding again this time with the correct IP address, the Linksys again forwards it to my desktop computer and all is well.

Arch Linux

#1 2014-10-11 17:53:58

[Solved] Port forwarding with Technicolor TC7200 and Linksys WRT54G

#2 2014-10-14 07:48:01

Re: [Solved] Port forwarding with Technicolor TC7200 and Linksys WRT54G

#3 2014-10-14 16:06:07

Re: [Solved] Port forwarding with Technicolor TC7200 and Linksys WRT54G

#4 2014-10-14 20:01:22

Re: [Solved] Port forwarding with Technicolor TC7200 and Linksys WRT54G

#5 2014-10-14 20:38:26

Re: [Solved] Port forwarding with Technicolor TC7200 and Linksys WRT54G

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