IPS_DST_NAT 50 include/linux/netfilter/nf_conntrack_common.h IPS_DST_NAT = (1 << IPS_DST_NAT_BIT), IPS_DST_NAT 53 include/linux/netfilter/nf_conntrack_common.h IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),