OpenWRT router in between G1100 and my PC, can't reach internet

I'm attempting to place an OpenWRT router in between my Verizon router (G1100) and my PC. I'd like to be able to access the internet from my PC. Verizon is bad about supporting 3rd party routers, so this setup seems like the easiest to me.

This is what my setup looks like:
G1100 -> LAN port -> Cat5 -> WAN port -> TP-Link TL-WDR3500 with OpenWRT 22 installed -> LAN port -> Cat5 -> my PC.

I can:

  • ssh onto the TL-WDR3500

I cannot:

The funny thing is, I was able to get a similar configuration working with the lower spec'd TL-WR841N. It has OpenWRT 19 installed, rather than 22.

G1100 -> LAN port -> Cat5 -> WAN port -> TP-Link TL-WR841N with OpenWRT 19 installed -> LAN port -> Cat5 -> my PC.

I can:

Here's the contents of /etc/config/network of each device.

TP-Link TL-WDR3500 with OpenWRT 22 installed (NOT WORKING): https://pastebin.com/SFAYTQyZ
TP-Link TL-WR841N with OpenWRT 19 installed (WORKING): https://pastebin.com/02RqjYbW

The TL-WDR3500 is currently assigned 192.168.1.3, but I've tried assigning it to 192.168.1.2 to no avail.

Any help is appreciated, as I'm a networking noob.

While there are many open questions (most importantly, is the g1100 configured as router or as mere cable modem), there is one rather immediate elephant in the room.

From your pasted configuration (while not 100% clear), it appears that your g1100 is configured as router and accessible under 192.168.1.1 itself. If that is indeed the case, you have a quite major misconfiguration at hand, as the IP subnets on wan and lan mustn't overlap for routing to work. In other words, wan side the tl-wdr3500 will receive something out of the 192.168.1.x/24 subnet from the g1100, lan side you must choose a different subnet (e.g. 192.168.2.1/24) for the OpenWrt router to hand out to your clients.

With cable internet, a router with 100 MBit/s ports only (such as the tl-wdr3500) might be limiting your performance quite significantly. While this obviously won't prevent the device from working, that is something to keep in mind going forward (even the tl-wdr3600 with its 1000BASE-T ports will max out around 150-170 MBit/s).

1 Like

You're right. The G1100 is assigned to 192.168.1.1. And after changing the TL-WDR3500 to a different subnet (192.168.2.1/24), I'm able to connect to the internet. Seems obvious now. Though it's perplexing to me how that wasn't necessary on the TL-WR841N. Oh well, I'm not going to question it.

With cable internet, a router with 100 MBit/s ports only (such as the tl-wdr3500) might be limiting your performance quite significantly.

My internet plan is 100 MBits/s anyway. I did a speed test, and there's a small performance hit, but I'm willing to deal.

Anyway, thanks for the solution.

This topic was automatically closed 10 days after the last reply. New replies are no longer allowed.