Many ISP routers have a protocol called . This allows the ISP to overwrite your settings remotely during nightly syncs.
If you are using a router from ISPs like Huawei, ZTE, or many GPON ONT devices, there is a backdoor account you might not know about: . telecomadmin password change
Why Leaving Your Router’s ‘telecomadmin’ Password Default is a Security Nightmare (And How to Change It) Many ISP routers have a protocol called
Do not use password123 . Use a password manager to generate a 16-character string. Example: Purple$Duck42#Sky! or many GPON ONT devices
Click Save/Apply. The router will likely kick you out immediately. You will need to log back in using telecomadmin + your new password . A Critical Warning: The TR-069 Trap