L2TP password on ZyXEL Keenetic?

Question

ZyXEL

Hello!
It so happened that the aforementioned box from the striped provider lives and distributes the Internet in the rented apartment. The owner of the box no longer lives here.
The WiFi password was received immediately. It was only necessary to log in via LAN to the web admin panel with the password indicated on the bottom of the device.
When the striped provider stopped serving the coveted Internet, the personal account was scouted through the same web interface. Fortunately, the personal account matches the L2TP login.
Yesterday there was a question about access to the personal account of the provider. There is no access to the linked phone, as well as the phone number itself.
In running-config, I came across a description of the VPN interface:
authentication identity 089783xxxx

authentication password ns3 TqTpWl9cVkZxHzOidSJGAF7K

What kind of beast is this ns3 from Zyxel? Something like a hash function, but local execution? Who faced?
Well, how to actually get the L2TP password from the above character set?

Answer 1

It looks like hash with salt.
If authentication is PAP, then you can not suffer and sniff the password corny.

Answer 2

There is a Python script for decrypting ns3.
https://forum.antichat.ru/threads/426200/

Answer 3

Unfortunately, there is no such firmware on the zyxel website. Similar opened, there is no such.
Do you have 4G?

Answer 4

Have you thought that "ns3 TqTpWl9cVkZxHzOidSJGAF7K" is your password? )