3 router setup

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mktoater

mktoater

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Oct 14, 2012
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Hey all.
I work in tech support so I'm not exactly a newb, but I'm not great at networking either...
H'ok, so I have 3 routers and no incoming connections.

zN9SXfG.jpg

(link to pic)

My computer is hardwired through the last router in a sequence of 3 routers as the picture describes. I've tried the "**The Ultimate Modem/Router Setup Thread**" and it seems like I'm missing something.

Back to the pic / setup. The modem is an Arris DG860A modem / router combo. The second router in the picture is a Netgear WNDR3400v3. And the third router is a Linksys WRT160Nv3.

Here is a link to a router emulator site: http://skyangel.wikidot.com/emulators

I'm trying to get a raspberry pi -- plugged into the linksys -- IP: 192.168.1.51 -- to get incoming connections.

I've tried opening ports on all 3 routers -- pointing to their respective ip addresses. Not sure what I'm missing...

If at all possible I would like to have Router 2 -- the Netgear router -- be the primary or Master router. Each router has their own seperate wifi ssid, except the Arris' is turned off.

On the Arris the Netgear router's IP is 192.168.0.4 and all the ports are forwarded to that IP.
On the Netgear the Linksys is 192.168.1.2 and RPI is 192.168.1.51. Both those have DHCP reservations. Ports are forwarded to ~.51

Let me know if I missed anything or if you need any more information!
Thanks!
 
Solution
B
These type problems are why it is recommended to only have a single router doing NAT whenever you can.

One of the 2 routers is not doing what you told it or has some small misconfiguration. First thing to try is put a PC on the 192.168.0.x network. See if this machine can send traffic to your device on the 192.168.1.x network remember you need to actually send you test traffic to second router ip on the 192.168.0.x network. If that works you could also try to change the forwarding on the main router to point to this test PC just to be sure traffic is getting though the main router.

If both work I would be suspect of the end device actually getting the traffic but not have a correct return path very tough to fix these sometimes
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bill001g

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Aug 9, 2012
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These type problems are why it is recommended to only have a single router doing NAT whenever you can.

One of the 2 routers is not doing what you told it or has some small misconfiguration. First thing to try is put a PC on the 192.168.0.x network. See if this machine can send traffic to your device on the 192.168.1.x network remember you need to actually send you test traffic to second router ip on the 192.168.0.x network. If that works you could also try to change the forwarding on the main router to point to this test PC just to be sure traffic is getting though the main router.

If both work I would be suspect of the end device actually getting the traffic but not have a correct return path very tough to fix these sometimes
 
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Solution
firefoxx04

firefoxx04

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Jan 23, 2009
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I run 2 routers at my house.

Internet > modem > Asus router > Asus router

The first router has a cable going from eth. 1 (you can pick any one of the 4) going into router 2's WAN port. So now router 2 is looking for internet from router 1.

Make sure router 2 has a static IP coming from router 1. So if router 1 is 192.168.1.1. Set router 2s WAN ip to 192.168.1.2

Router 2's internal ip is 192.168.2.1 (notice the different subnet). Anything connected to router 2 will have an ip of 192.168.2.x while anything connected to Router 1 is 192.168.1.1.

you could do the same thing with a third router by running a cable from router 2 to the WAN on router 3. Set the WAN ip on router 3 to something like 192.168.2.2 and set the internal ip on router 3 to 192.168.3.1 (or whatever you want.)


I have a server on my second router. I am able to access this server from the outside world (school, work, etc) by port forwarding those ports on the first router to the ip 192.168.1.2 (the ip assigned to my second router) and then I setup port forwarding on the second router to my server (192.168.2.2)

I hope that made sense.. its working for me very well. I can turn my router off (disconnecting my desktop, xbox, server) without shutting internet off to the rest of the house (family, friends, etc).
 
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mktoater

mktoater

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Oct 14, 2012
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I've tried that but the Linksys won't take for some reason -- once I change the subnet to 192.168.2.x I can no longer connect to a) the internet, b) the Linksys router, and c) the Netgear router. I'm baffled as to why...
 
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mktoater

mktoater

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Oct 14, 2012
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Ok, so I changed the Arris modem / router to Bridged NAT and disabled NAT on the Linksys -- keeping the 2nd one (Netgear) enabled. Is this correct? Or should I disable the Netgear's NAT. It still doesn't really work.

Question: If I enable wifi on the Arris router and connect that way, could I test traffic that way? Would that work with Bridged NAT? The main problem with that is that my devices are either hard wired and going through a router or they are through wireless...
 
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mktoater

mktoater

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Oct 14, 2012
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Solved.
Changed some settings, but the main issue was that the Arris router wouldn't save the "Bridged" mode settings no matter how many times I tried, and had to call ISP to have them change it -- assholes.

In the pic above it's now changed to:
Wifi: Off
DHCP: Off
Nat: Bridged
Firewall: Off

Thanks all!
 
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rrr6

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May 4, 2014
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I'm using Linksys as 2nd router( E900 ) and I used the "Cisco Connect" feature that allows auto setup the E900 to be on a seperate network and share the same ISP. Linksys manual makes this clear that this is NOT and access point setup.

My problem was that I need my 2nd rotuer to have a traffic/usage meter so that I can check ONLY the traffic throught it and not the 1st router. Linksys does not have traffic/usage meter.

SO currently looking for directions on how to setup 2nd Netgear router as a "seperated network" i.e. it will have its own SSID and its own password.

thx rrr6
 
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