Netfilter nf_tables reject support

modulename: nft_reject.ko

configname: CONFIG_NFT_REJECT

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>The IPv6 protocol
└─>Netfilter nf_tables reject support
In linux kernel since version 3.14 (release Date: 2014-03-30)  
This option adds the "reject" expression that you can use to
explicitly deny and notify via TCP reset/ICMP informational errors
unallowed traffic.

source code:
net/netfilter/nft_reject.c