1#unconditional
2NET_IPV4_CONF_FORWARDING
3NET_IPV4_CONF_MC_FORWARDING
4NET_IPV4_CONF_PROXY_ARP
5NET_IPV4_CONF_ACCEPT_REDIRECTS
6NET_IPV4_CONF_SECURE_REDIRECTS
7NET_IPV4_CONF_SEND_REDIRECTS
8NET_IPV4_CONF_SHARED_MEDIA
9NET_IPV4_CONF_RP_FILTER
10NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE
11NET_IPV4_CONF_BOOTP_RELAY
12NET_IPV4_CONF_LOG_MARTIANS
13NET_IPV4_CONF_TAG
14NET_IPV4_CONF_ARPFILTER
15NET_IPV4_CONF_MEDIUM_ID
16NET_IPV4_CONF_NOXFRM
17NET_IPV4_CONF_NOPOLICY
18#conditional
19NET_IPV4_CONF_FORCE_IGMP_VERSION
20NET_IPV4_CONF_ARP_ANNOUNCE
21NET_IPV4_CONF_ARP_IGNORE
22NET_IPV4_CONF_PROMOTE_SECONDARIES
23NET_IPV4_CONF_ARP_ACCEPT
24NET_IPV4_CONF_ARP_NOTIFY
25