1iptables-translate -t mangle -A PREROUTING -m rpfilter 2nft add rule ip mangle PREROUTING fib saddr . iif oif != 0 counter 3 4iptables-translate -t mangle -A PREROUTING -m rpfilter --validmark --loose 5nft add rule ip mangle PREROUTING fib saddr . mark oif != 0 counter 6 7ip6tables-translate -t mangle -A PREROUTING -m rpfilter --validmark --invert 8nft add rule ip6 mangle PREROUTING fib saddr . mark . iif oif 0 counter 9