1 NET_IPV4_CONF_FORWARDING 2 NET_IPV4_CONF_MC_FORWARDING 3 NET_IPV4_CONF_PROXY_ARP 4 NET_IPV4_CONF_ACCEPT_REDIRECTS 5 NET_IPV4_CONF_SECURE_REDIRECTS 6 NET_IPV4_CONF_SEND_REDIRECTS 7 NET_IPV4_CONF_SHARED_MEDIA 8 NET_IPV4_CONF_RP_FILTER 9 NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE 10 NET_IPV4_CONF_BOOTP_RELAY 11 NET_IPV4_CONF_LOG_MARTIANS 12 NET_IPV4_CONF_TAG 13 NET_IPV4_CONF_ARPFILTER 14 NET_IPV4_CONF_MEDIUM_ID 15 NET_IPV4_CONF_NOXFRM 16 NET_IPV4_CONF_NOPOLICY 17 NET_IPV4_CONF_FORCE_IGMP_VERSION 18 NET_IPV4_CONF_ARP_ANNOUNCE 19 NET_IPV4_CONF_ARP_IGNORE 20 NET_IPV4_CONF_PROMOTE_SECONDARIES 21 NET_IPV4_CONF_ARP_ACCEPT 22 NET_IPV4_CONF_ARP_NOTIFY 23