For step by step instructions, check out → https://yescrowd.optus.com.au/t5/Broadband-Telephony/Help-With-Your-WiFi-Modem-Username-amp-Password...
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This is very confusing for me- I have used this IP address to change the wifi password in my home, but couldn't my flatmate just type in the same IP address and change it again? How is the new password protected from other people seeing it?
Does your housemate know Optus modem login credentials? If so, you can always change your password via the admin settings page.
When you enter 192.168.0.1, you should be presented with the screen below:
Choose a new password, hit save and apply.
This is the one I am originally referring to. Even if I changed the password, can’t my flatmate log on anyway with the generic admin and password to see the current password?
at the moment I access it that way and the password isn’t protected by the stars; it is visible. So it can easily been found for him to log in using his laptop.
im just not sure how it works or why it appears to be such an insecure web page.
Once it's changed, he'd need to login with the new password that you've created.
Technically, he could always factory reset the modem and the username and password will be set to the default password (the password located on the rear of the modem).
Can you navigate to the access control screen and see whether it allows you to change the password from there?
Modem Advanced Settings → Management/Access Control → Enable Optus Secure Password.
I don’t know where the modem access control settings are.
why doesn’t Optus have any actual security measures for this situation? What’s the point of a password if anyone can just reset or change the password and log in again?
The only way I can change the password is by typing in 192.168.0.1 into my browser and entering the generic admin and password login. What’s the point if anyone can do that?
As per his screenshot above, do you have the "Advanced settings" option on your end? From here you should be able to change the password.
I can only apologise that there aren't further measures in place to stop someone from locally resetting the hardware, this is a normal process for standard modems. Have you looked into purchasing a third party router to add to your set up? This may provide the further security you require.