Optus Default Modem Passwords
This page lists 4 confirmed default credentials for Optus equipment, covering 4 models. On most of this equipment both the username and the password are printed on that unit’s own label.
Entries are reachable over http. All of these entries use a protocol that sends the password in clear text, so use them on a trusted network and change the password once you are in.
| Model | Protocol | Access | Username | Password |
|---|---|---|---|---|
| SAGEMCOM F@ST 5366 TN | HTTP | Admin | unique to your unit | unique to your unit |
| SAGEMCOM F@ST 5393 LTE GATEWAY | HTTP | Admin | leave blank | unique to your unit |
| ULTRA WIFI 5G MODEM | HTTP | Admin | leave blank | unique to your unit |
| ULTRA WIFI MODEM GEN 2 | HTTP | Admin | leave blank | unique to your unit |
About Optus
Optus supplies the Ultra WiFi Modem, and on older plans Sagemcom F@ST modems. The Optus records here run across the Sagemcom and Ultra lines.
Reaching the login page
The admin page on most Optus units answers at http://192.168.0.1. If that address does not load, the router is whatever your computer lists as its default gateway — ipconfig on Windows or ipconfig getoption en0 router on a Mac will tell you.
The Ultra WiFi Modem asks only for a password. It is printed on the base sticker under MODEM SETTINGS, below the WiFi SETTINGS section, and it is not the Wi-Fi password.
What the Optus defaults look like
On 1 of the 4 entries the username is printed on that unit’s own label. 3 of them ask for no username at all. On 4 entries the password is unique to each unit and printed on its label.
All of them are reached over a protocol that puts the password on the wire in clear text, so work from a machine on the same wired network rather than across the internet, and change the password once you are in.
Where Optus prints the admin password
Two passwords on one sticker
The Optus sticker has two sections. WiFi SETTINGS holds the network name and the password that joins the Wi-Fi. MODEM SETTINGS holds the address, 192.168.0.1, and the password that opens the modem’s settings. Use the second one to log in.
If the Optus password has already been changed
There is a recessed reset button on the back or underneath that needs a straightened paperclip. Hold it in for thirty seconds with the unit powered on. Let go when the lights change pattern, and give it a couple of minutes to come back up.
The catch with an ISP-supplied unit is that a reset also clears the broadband credentials, and on some lines the router will not reconnect until those are re-entered. Find them before you press anything, or be ready to ring the provider.
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