• ... login as root on a remote server after 3 o’clock in the morning…

• ... to then play around with kldload (load kernel module), especially if you accidentially load the ipfw (firewall) kernel module, whose default setting is deny any access :)

Once you did this, your only chance of gaining remote access to your server again is to request a reboot of your machine. This is what happended to me. But: No Risk no Fun :)