I have a small network with a modem, a WRT54GL router and my laptop. When I connect my laptop directly to the modem I can access the web interface of the modem by navigating to 192.168.1.1 (this cannot be changed). When I connect my router (192.168.1.2) to the modem and then connect my laptop to the router I can not access the modem any longer.
I have confirmed that I do not have an IP conflict. I'm able to get on the web and access the DD WRT UI of my router but I can't access the modem any longer.
Here is the WAN Connection info from the router:
Connection Type: Automatic Configuration - DHCP
IP Address: xxx.xx.xxx.xx
Subnet Mask: 255.255.255.252
Gateway: 148.63.162.29
DNS: 1148.78.249.200
DNS: 2148.78.249.201
And here is my Network Adapter info (ipconfig):
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.102(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.2
DHCP Server . . . . . . . . . . . : 192.168.1.2
DNS Servers . . . . . . . . . . . : 192.168.1.2
NetBIOS over Tcpip. . . . . . . . : Enabled
I see that the subnet mask is different and I suspect that essentially means I have two networks: My modem-router network and my router-laptop network, however this is just a guess and I'm reluctant to change things I don't understand.
If the subnet masks are the reason I can't get to the modem from the router is the solution to update the DHCP configuration on the router to use the same subnet mask as the modem is handing down to the router?