#unconditional
NET_IPV4_CONF_FORWARDING
NET_IPV4_CONF_MC_FORWARDING
NET_IPV4_CONF_PROXY_ARP
NET_IPV4_CONF_ACCEPT_REDIRECTS
NET_IPV4_CONF_SECURE_REDIRECTS
NET_IPV4_CONF_SEND_REDIRECTS
NET_IPV4_CONF_SHARED_MEDIA
NET_IPV4_CONF_RP_FILTER
NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE
NET_IPV4_CONF_BOOTP_RELAY
NET_IPV4_CONF_LOG_MARTIANS
NET_IPV4_CONF_TAG
NET_IPV4_CONF_ARPFILTER
NET_IPV4_CONF_MEDIUM_ID
NET_IPV4_CONF_NOXFRM
NET_IPV4_CONF_NOPOLICY
#conditional
NET_IPV4_CONF_FORCE_IGMP_VERSION
NET_IPV4_CONF_ARP_ANNOUNCE
NET_IPV4_CONF_ARP_IGNORE
NET_IPV4_CONF_PROMOTE_SECONDARIES
NET_IPV4_CONF_ARP_ACCEPT
NET_IPV4_CONF_ARP_NOTIFY