Not trusting adsl router - what can be done about it
 

Some adsl routers have additional login passwords that do not appear in the configuration. And they are the same for all customers! For example this adsl router:

http://wwwen.zte.com.cn/en/products/...22_424137.html

Rather than switch to another model and hope there is no hidden security breaches, what else can one do? Go back to the 56 kbits/s telephone line modems of 20 years ago? Anything else?

You should know not to multi-post. Reported for closure.

That was not intentional, sorry.