iptables-translate -t mangle -A PREROUTING -m rpfilter nft add rule ip mangle PREROUTING fib saddr . iif oif != 0 counter iptables-translate -t mangle -A PREROUTING -m rpfilter --validmark --loose nft add rule ip mangle PREROUTING fib saddr . mark oif != 0 counter ip6tables-translate -t mangle -A PREROUTING -m rpfilter --validmark --invert nft add rule ip6 mangle PREROUTING fib saddr . mark . iif oif 0 counter