table ip nat {
	map ipportmap {
		type ipv4_addr : interval ipv4_addr . inet_service
		flags interval
		elements = { 192.168.1.2 : 10.141.10.1-10.141.10.3 . 8888-8999, 192.168.2.0/24 : 10.141.11.5-10.141.11.20 . 8888-8999 }
	}

	map ipportmap2 {
		type ipv4_addr . ipv4_addr : interval ipv4_addr . inet_service
		flags interval
		elements = { 192.168.1.2 . 192.168.2.2 : 127.0.0.0/8 . 42-43 }
	}

	map fwdtoip_th {
		type ipv4_addr . inet_service : interval ipv4_addr . inet_service
		flags interval
		elements = { 1.2.3.4 . 10000-20000 : 192.168.3.4 . 30000-40000 }
	}

	chain prerouting {
		type nat hook prerouting priority dstnat; policy accept;
		ip protocol tcp dnat ip to ip saddr map @ipportmap
		ip protocol tcp dnat ip to ip saddr . ip daddr map @ipportmap2
		meta l4proto { tcp, udp } dnat ip to ip daddr . th dport map @fwdtoip_th
	}
}