kernelconfig_penguin

Netfilter OSF over NFNETLINK interface

modulename: nfnetlink_osf.ko
configname: CONFIG_NETFILTER_NETLINK_OSF

Linux Kernel Configuration
└─> Networking support
└─> Networking options
└─> Network packet filtering framework (Netfilter)
└─> Core Netfilter Configuration
└─> Netfilter OSF over NFNETLINK interface

In linux kernel since version 4.2 (release Date: 2015-08-30)  

If this option is enabled, the kernel will include support
for passive OS fingerprint via NFNETLINK.


source code:


net/netfilter/nfnetlink_osf.c