XT_LIMIT_SCALE 5 include/linux/netfilter_ipv4/ipt_limit.h #define IPT_LIMIT_SCALE XT_LIMIT_SCALE XT_LIMIT_SCALE 5 include/linux/netfilter_ipv6/ip6t_limit.h #define IP6T_LIMIT_SCALE XT_LIMIT_SCALE XT_LIMIT_SCALE 90 net/netfilter/xt_limit.c return (user / XT_LIMIT_SCALE) * HZ * CREDITS_PER_JIFFY; XT_LIMIT_SCALE 92 net/netfilter/xt_limit.c return (user * HZ * CREDITS_PER_JIFFY) / XT_LIMIT_SCALE;