Unable to access routerboard 1100 after ca signed

Hi,

I must have done something I shouldn't have. I created a certificate, validated it on zerossl, uploaded it, and made it available on web-ssl, but now I can't access it anymore. I also tried with Winbox, but it doesn't detect the machine. If I run nmap, I only see the following TCP ports open:
443,2000,8728,8729
Do you have any suggestions for restoring access? Fortunately, I made a backup before.
Thank you.

You can reset it defaults using the reset button. Typically that mean unplug, hit reset button, keep holding while plugin for ~7 seconds (until flashing), and then release button. Either2+ will have a LAN, where you can connect and restore your backup.

Even MAC access does not help?

Put IP/MAC + credentials directly into Winbox and try to connect. Sometimes Winbox does not show devices but access is still possible.

Thanks for your suggestion. Unfortunately it doesn’t work. I’ll do as Amm0 suggested.

Thanks…