Fairly complicated networking issue

September 1, 2009 at 19:47:17
Specs: Windows XP, Intel i7 950
OK, so this might be a fairly complicated question, but I hope someone can understand and help provide a solution. I'm pulling my hair out.

There are two different routers at my place. One I will call linksys (which has the default linksys wrt54g firmware on it) and one that I will call dd-wrt (has dd-wrt as its firmware).

Linksys is upstairs, and hooked up to the internet. DD-wrt is downstairs and has no modem to hook into. What I was doing was having dd-wrt act as a repeater bridge and it was connected as a client to linksys's network.

The network on linksys was a 192.168.1.x network, and the network on dd-wrt was a 192.168.2.x network.

What I want to be able to do is VPN in to a computer, that's residing on the dd-wrt network. But to do this, it would obviously have to go through the linksys network, and then be routed to dd-wrt (since dd-wrt is connected as a client to the linksys network). I setup port forwarding, and even in sheer desperation I set ports 1-5000 to be forwarded to (dd-wrt's IP address on linksys's network). I then had dd-wrt forwarding all requests on ports 1-5000 to (the computer on the dd-wrt network that I want to act as my VPN server).

However, no connection is ever made. It's getting lost somewhere. I'm thinking it has to be (obviously) somewhere in the transition from the 192.168.1 network to the 192.168.2 network. I've tried putting dd-wrt in a dmz on linksys's network, and the computer I want receiving the connection on the dmz in dd-wrt's network, but to no avail.

Anyone have suggestions which would make this work? I need some help.

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September 1, 2009 at 21:01:29
First question is, what kind of VPN are you using?
I'm asking, because it's not a that good idea, to forward all the ports 1-5000 to the DD-WRT.
You should be aware of the ports, you have to use for that VPN connection and only that ports have to be forwarded.
If this is done, you should be able to do a portscan from a PC of the 192.168.2.x network to the ip and should get the VPN port listed as open.

Another thing is, are you able to ping the Linksys router from within the DD-WRT router and vice versa.

Please send a reply, if you solved the problem !!!

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September 2, 2009 at 06:25:26
I am unable to ping the dd-wrt router while on the linksys network itself. However, I'm thinking that the reason for that is just because routers don't reply to pings. The port I am using is 1723. I'm just using windows's built in vpn for quick access. The reason I had opened all ports was to just try to make sure that there wasn't one I was missing vs it turning out to be a networking issue. If there was one I was missing, then it would have been able to connect once I opened all those ports, but since it can't it looks to be a networking issue somehow.

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September 2, 2009 at 08:04:10
"was having dd-wrt act as a repeater bridge"

If you had set this up as a repeater it would be in the same subnet as the linksys which would also make the pcs connected to the ddwrt router also in the same subnet.

You are doing nat not bridging.

Set to bridging and you have solved all of your problems.

Perhaps this will help


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