Making real-time kernel adjustments in Linux

/proc/sys is an important directory in Linux, it contains many of the adjustable kernel values that can be changed while a system is running. it also provides a lot of information that can be collected and parsed by a script that might validate certain security settings. For instance, we have the file below, its contents (a zero or a one) would indicate whether or not the kernel is allowed to forward packets.

/proc/sys/net/ipv4/ip_forward