# # XFRM configuration # config XFRM bool depends on NET config XFRM_USER tristate "Transformation user configuration interface" depends on INET && XFRM ---help--- Support for Transformation(XFRM) user configuration interface like IPsec used by native Linux tools. If unsure, say Y. config XFRM_SUB_POLICY bool "Transformation sub policy support (EXPERIMENTAL)" depends on XFRM && EXPERIMENTAL ---help--- Support sub policy for developers. By using sub policy with main one, two policies can be applied to the same packet at once. Policy which lives shorter time in kernel should be a sub. If unsure, say N. config NET_KEY tristate "PF_KEY sockets" select XFRM ---help--- PF_KEYv2 socket family, compatible to KAME ones. They are required if you are going to use IPsec tools ported from KAME. Say Y unless you know what you are doing.