Resist, resist. The knock utility (and associated knockd daemon) are simple and resilient - don't make it more complex. Instead, add a simple line to your .lo

Resist, resist. The knock utility (and associated knockd daemon) are simple and resilient - don't make it more complex. Instead, add a simple line to your .login (or whatever) that sends you an SMS every time a successful (three packet) knock occurs. You're the only one that should perform that ... so it would be very interesting if a successful knock occurred without your having knocked ...