Comment by gurustave

Classic! I remember using Port Knocking during the Louisiana Tech CyberStorm Hacking Competition in 2015 to completely lock down open ports on our VM Host Server since trying to use the glitchy Server KVM directly on the Rack was a test in futility. Between Port Knocking, Xpra, and knowing to disconnect the VMs from the network until after I had patched them, no one stood a chance hacking our VMs. Their VMs on the other hand often didn't withstand my scripts just constantly trying to get in with the VM default passwords, change the flags to give us credit, lockdown and take over root, leaving us a way back in after, and continuously using the root account to reclaim the flag if they noticed.