PF_KEY sockets (deprecated)

modulename: af_key.ko

configname: CONFIG_NET_KEY

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>PF_KEY sockets (deprecated)
In linux kernel since version 2.6.12 )
PF_KEYv2 socket family, compatible to KAME ones.

The PF_KEYv2 socket interface is deprecated and
scheduled for removal. All maintained IKE daemons
no longer need PF_KEY sockets. Please use the netlink
interface (XFRM_USER) to configure IPsec.

If unsure, say N.
source code: