I got my hands on a Zywall USG300 VPN router. It had been unused for a long time and was lying in a depository. I found a use for it, but a problem arose. When trying to log in via the web interface, it returned an error: ERR_SSL_VERSION_OR_CIPHER_MISMATCH
To get into remote router management, I had to enable router management via the http interface. This can be done easily using CLI commands from the console. You can connect to the console via the serial RS232 interface, or via SSH, which is easier if the network interface is functional. I don't need to remind you that the factory reset was performed by holding down the reset button on the router's front panel for more than 5 seconds.
I logged into the router's SSH console and entered the following commands:
configure terminal
no ip http secure-server
write
exit
Now it is possible to access the router settings via the http protocol at address http://192.168.99.1. Default login credentials are: admin and password is 1234 .
