How to access the signal levels of my cable modem behind a Wi-Fi router?
It is very useful to know the DOCSIS cable modems signal levels, as detailed in this FAQ: How to access signal levels on my cable modem?
However, it is very common that the default cable modem IP address for statistics is not accessible if you are behind a Wi-Fi Router. We will detail the steps to connect to your cable modem even behind your Wi-Fi below. This assumes some knowledge of networking and IP addresses.
1. Connect to the admin interface of your Wi-Fi router - you will need to know the router IP, admin username/password. It is often at 192.168.1.1, or you can lookup defaults in our hardware database with nearly 5000 routers/modems.
In the Wi-Fi routers admin interface, navigate to LAN settings, and look for setting up a "static route".
2. Add a static route to the cable modem's diagnostic IP - this is usually located in the "LAN" section of routers' settings.
The "static route" settings you'll need to add are as follows:
IP address: 192.168.100.1 (the IP of the cable modem's stats page, or ISP router admin page)
Gateway: 192.168.1.1 (or the IP of your Wi-Fi router)
2a. Alternatively, connect a client device directly to the cable modem - if the above steps don't work for you, or seem too complicated, you can connect a PC/Laptop directly to the cable modem with an Ethernet cable. Note that you'd likely have to reboot the cable modem to recognize the new device connected to it.
What cable modem signal levels are considered good?