Cable modem status

192.168.100.1 Login

192.168.100.1 is a side door into many cable modems. The page lists downstream and upstream power. It often cannot rename your Wi-Fi. That job stays on the router address, commonly 192.168.1.1 or 10.0.0.1.

Quick answer

Open http://192.168.100.1 from a device attached to the modem. If you see signal levels, you are in the right place for diagnostics and the wrong place for a new Wi-Fi password.

Open on this network

This link only works when your phone or computer is connected to that router. A website on the public internet cannot log in for you.

How to log in to 192.168.100.1

  1. 1

    Plug into the modem or its Wi-Fi

    A separate router’s Wi-Fi may hide 192.168.100.1. Connect a computer to the modem LAN port if the status page times out.

    192.168.100.1
    Where to type the address
  2. 2

    Read the page type

    Downstream power, SNR, and uncorrectable errors mean a modem status page. A wireless menu means this unit is also your router.

    192.168.100.1 admin ••••••
    What the login box looks like
  3. 3

    Change Wi-Fi on the other address

    When this page has no wireless section, open 192.168.1.1 or 10.0.0.1, whichever your gateway shows. Password help: change the Wi-Fi password.

    Wi-Fi Home-2G / Home-5G Admin 192.168.100.1
    Where the sticker password usually is

Default username and password

Brand Username Password Notes
Arris / Motorola admin motorola Some SURFboard status pages. Others use the last characters of the serial.
Cable modem admin Printed on the sticker If the label has no admin row, the status page may open without a password.

These are common factory values published for first-time setup of equipment you own. An ISP, installer, or previous owner may have changed them. After you get in, set your own admin password.

Two addresses in one house

A common layout is the modem at 192.168.100.1 for line stats and the Wi-Fi router at 192.168.1.1 for everything you actually change. Bookmark both, and label them, so a failed login is not spent on the wrong box.

192.168.100.1 will not open

The address times out behind your own router

The router does not route 192.168.100.1 upstream. Plug the computer straight into the modem, or temporarily connect to the modem’s own Wi-Fi if it has one.

You wanted port forwarding

Forward on the device that holds your LAN, not on a status-only modem page. See port forwarding.

Levels are in the red and Wi-Fi is fine

That is a line problem for the cable provider. Changing the admin password on 192.168.1.1 will not repair upstream power.

Related router addresses

Frequently asked questions

How do I log in to 192.168.100.1?

Connect to the modem and type http://192.168.100.1. Some pages open directly. Others want admin and a label password or motorola on older SURFboard units.

Can I change the Wi-Fi password here?

Only if this hardware is a gateway with a wireless menu. A status-only page cannot do it. Use the gateway address instead.

What do the signal numbers mean?

They describe the cable line, not your password. Consistent out-of-range values are something the ISP measures on a truck roll. They are not fixed by a factory reset of the Wi-Fi router.

Reviewed 2026-09-29