Port knocking is a very easy and simple way to secure your network
services. There are many ways to use port knocking: using a series of
UDP packes towards different ports with some content, or just sending a
series of SYN packets on different ports.
These methods usually requires a program to do the task.
Ping, however, is usually available from any device.
These methods usually requires a program to do the task.
Ping, however, is usually available from any device.
