I can't login to the admin panel on the router. How to enter?

Question

WiFi

I have Wi-Fi without a password, but with a white list. That is, only those who are on this list can connect to my Wi-Fi. Everything was fine, no one could connect to my wifi, but today I found out that a neighbor is sitting in my wifi. It just connects with no problems. I tried to go to the admin panel to fix it, but I could not log in either from a computer or from a tablet.
On the Internet, I found a couple of articles that said that the problem in most cases is not obtaining IP and DNS automatically. But I have it all set. Ping from 192.168.0.1, see the screenshot.
Included with the router there is a disk for configuring the router, but at the first steps it knocks out an error.
And of course I tried to reset the router settings on the router itself, but in vain - it does not react to it in any way. PS I used the Charles program (HTTP monitoring), maybe it has some meaning.

Answer 1

Found a solution on cyberforum:

Hard reset or 30/30/30 - clearing the area of ​​​​non-volatile memory (NVRAM), where some user data and router settings are stored. Often in NVRAM, in addition to useful information, a lot of all sorts of "garbage" is collected, which is not completely cleared by the Factory Default procedure (factory reset), for example, after changing firmware of different types DD-WRT, Tomato or old ones.
With the router turned on, press and hold the RESET button on the back of the module for 30 seconds
Without releasing the reset button, turn off the router and hold RESET for another 30 seconds
Turn on the router and hold the RESET button for the last 30 seconds

Answer 2

Enter "telnet 192.168.0.1 80" in the command line and see if the web server itself is available on the router.

Answer 3

By the way, on some firmware, when you enable https, you need to force the protocol to be written in the address bar, otherwise the same error will fly out.