I have a router with an unknown IP address with no functioning DHCP server.
I have to connect to the router using a static (non-DHCP) IP (I have tried several including 192.168.1.10). The link LED suggests that I do have a wired ethernet link.
I want to find out the IP (v4) and subnet that the router responds to.
I have tried using a netmask of 0.0.0.0 and pinging the broadcast address but no response has been received from the router.
nmap scanning would probably take a very long time as I don't have any idea what subnet the router is on - it could be 10.x.x.x or 172.x.x.x or 192.168.x.x
Are there any other ways to discover hosts' IP addresses when very little is known about the network topology and the subnet could be anything?