As a pentester, I often use NetCat, and its encrypted counterpart CryptCat. However, even CryptCat only encrypts the traffic.
I'm looking for a way to keep unauthorized users from gaining access to the backdoors I have created. I guess I could whitelist the static IP of my computer, and block all other LAN connections to prevent others from connecting, but by no means is that an ideal solution. I feel like there should be some NetCat-like derivative that supports both encryption and password protection out of the box.
How can I prevent unauthorized access to a NetCat backdoor?