Netfilter ingress support

configname: CONFIG_NETFILTER_INGRESS

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>Netfilter ingress support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This allows you to classify packets from ingress using the Netfilter
infrastructure.