Posted: Tue Jan 10, 2017 17:57 Post subject: Pings & DNS lookups failing from 4th router in chain
I have four routers chained together.
Router 1 (Linksys 300N) is connected to a DSL modem and also acts as an AP. It is the default gateway for the network (192.168.1.1).
The DSL modem provides two DNS server addresses:
DNS Servers . . . : 192.168.0.1 & 205.171.3.65
Router 2 (Linksys 150N) is client-bridged to router 1.
Router 3 (Linksys 150N) is directly cabled to router 2 and is client-bridged to router 4.
Router 4 (Linksys 300N) acts as an AP with an SSID different from router 1.
All routers, except router 1, are running DD-WRT.
I can ping router 1 (192.168.1.1) from a PC cabled to router 4. I cannot ping the DSL modem (192.168.0.1) from the same PC and cannot lookup DNS names from that PC.
An "ipconfig/all" from the PC connected to router 4 shows
Joined: 18 Mar 2014 Posts: 12923 Location: Netherlands
Posted: Tue Jan 10, 2017 19:52 Post subject:
If I understand correctly your DSL modem is not in bridge mode, it is on a separate network: 192.168.0.0
Router one is acting as gateway and the WAN port of router one is connected to the DSL modem.
This WAN connection type must be Automatic, router IP 192.168.1.1 with netmask 255.255.255.0
Leave everything else 0.0.0.0
This will result in a DNS server of 192.168.1.1 and NOT 192.168.0.1
If you have a look at the Status/WAN page of router one there should be the IP address of the WAN port which is something llike 192.168.0.x and corresponding netmask and DNS server.
Edit: all other routers should have dhcp server disabled
This should give you internet access (I hope)
If this works we can take the next step, which is linking subnets
What's odd about this is if I reverse the functions of the 3rd and 4th routers everything works. That is, I make router 3 an access point and router 4 is client-bridged to router 3.
Joined: 18 Mar 2014 Posts: 12923 Location: Netherlands
Posted: Wed Jan 11, 2017 8:45 Post subject:
Be sure to disable DHCP server on routers 2,3 and 4 and also disable DNS masq from the services tab.
Do not use the WAN port if you have wired connections between the routers.
This is to create one subnet for routers 1,2,3,4 where only router 1 has the DHCP server at 192.168.1.1 with DNS server and default gateway at 192.168.1.1.