Netfilter nf_tables log module

modulename: nft_log.ko

configname: CONFIG_NFT_LOG

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>Netfilter nf_tables log module
In linux kernel since version 3.13 (release Date: 2014-01-19)  
This option adds the "log" expression that you can use to log
packets matching some criteria.

source code: