File: setmap.nft

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rust-nftables 0.6.3-2
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#!/sbin/nft -f

# https://wiki.nftables.org/wiki-nftables/index.php/Maps

flush ruleset

table ip nat {
	map porttoip {
		type inet_service : ipv4_addr
		elements = { 80 : 192.168.1.100, 8888 : 192.168.1.101 }
	}

	chain prerouting {
		dnat to tcp dport map { 80 : 192.168.1.100, 8888 : 192.168.1.101 }
	}

	chain postrouting {
		snat to tcp dport map @porttoip
	}
}