Help with router communications

March 20, 2018 at 15:00:50
Specs: windows 7
hooked up both my routers in bridge lan to wan mode. main router is connected to isp on 192.168.1.0/24 and the 2nd router is on 192.168.2.0/24.
From 2nd router I can ping my lan ip address, default gateway, main router default gateway, and pc on the lan. From main router I can only ping my lan and default gatway, I cant seem to ping the 192.168.2.0/24 at all.
I have configured both routers with static routing. Main router 192.168.2.0 255.255.255.0 192.168.2.1 and 2nd router to 192.168.1.0 255.255.255.0 192.168.1.1. main router and 2nd router has static ip addresses and dhcp enabled. I configured the normal things like hostname, wireless settings ssid/wpa2, router password, etc. Everything else is in default configuration.
If I can ping to both networks on 2nd router and main router to its lan only, is it my firewall in windows 7 or I need to configure something else in main or 2nd router?
Main router is a linksys ea9300 and 2nd router is a linksys ea4500, both have the latest firmware.

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#1
March 20, 2018 at 17:09:11
Use the same string for both routers except for the last series to be on the same 'network'.
If one router is 192.168.1.1 then the other needs to be 192.168.1.2 or 92.168.1.11
The second router needs to have the DHCP disabled, letting the primary router handle all of that.


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You have to be a little bit crazy to keep you from going insane.


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#2
March 21, 2018 at 01:44:56
WAN ports on a home router act as a firewall because of NAT (Network Address Translation).
If IP traffic originates from the LAN ports towards the WAN, the return/response will be routed to the right LAN (and device).

Traffic that originates from the WAN (internet in most cases) will be blocked unless you have set port-forwarding to one or more devices.
If only one device needs be reached from WAN, a DMZ can be set to that device. It will forward all ports to the device configured as if it is directly connected to WAN.

Instead of WAN port on second router, use a LAN port on the second router.

message edited by sluc


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#3
March 21, 2018 at 07:07:18
If you tell us what it is you're trying to do it would make helping you a lot easier.

I have written a simplified "how-to" guide on adding a second router which you should probably read. Simply click on my name above and in the page that opens up, scroll down to "How to posts by Curt R" and click on the "Add a second router" link and read it through.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#4
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#5
March 22, 2018 at 05:52:04
Try the following:

Router_1 LAN port - 192.168.1.1
Router_1 WAN port - maybe dynamic assigned by your ISP or a fixed public ip address.
Router_2 LAN port - 192.168.2.1
Router_2 WAN port - 192.168.1.2

So Router_2 can access the network 192.168.1.0 255.255.255.0, cause the WAN interface of Router_2 is in the same network as Router_1.

The thing is, that Router_1 has no idea, where to find devices in 192.168.2.0 255.255.255.0.

Therefore, you need a static route in Router_1 to the network or Router_2.

Form Router_1s perspective, the network 192.168.2.0 255.255.255.0 is reachable to the WAN port of Router_2 (192.168.1.2).

Therefore the static route in Router_1 must be:
192.168.2.0 255.255.255.0 192.168.1.2 (WAN port of Router_2)

This should work.


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