Legacy ARPTABLES support

modulename: arp_tables.ko

configname: CONFIG_IP_NF_ARPTABLES

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>IP: Netfilter Configuration
└─>Legacy ARPTABLES support
In linux kernel since version 2.6.12  
arptables is a legacy packet classifier.
This is not needed if you are using arptables over nftables
(iptables-nft).

source code: