polycule-network/templates/rules.nft

flush ruleset

table ip filter {
    map ip_map_snat {
        type ipv4_addr : ipv4_addr
    }
    map ip_map_dnat {
        type ipv4_addr : ipv4_addr
    }

    set local_range {
        type ipv4_addr
        flags interval
    }

    set remote_range {
        type ipv4_addr
        flags interval
    }

    set local_translated_range {
        type ipv4_addr
        flags interval
    }

    chain postrouting {
        type nat hook postrouting priority 100; policy accept;

        ip saddr @local_range ip daddr @remote_range snat to ip saddr map @ip_map_snat
    }

        chain prerouting {
        type nat hook prerouting priority 100; policy accept;

        ip saddr @remote_range ip daddr @local_translated_range dnat to ip daddr map @ip_map_dnat
    }
}