root@melampus:~# cat /etc/nftables.conf 
table ip nat {
	chain postrouting {
		type nat hook postrouting priority srcnat; policy accept;
		masquerade
	}

	chain prerouting {
		type nat hook prerouting priority dstnat; policy accept;
		ip daddr 147.251.50.157 tcp dport { 15022 } dnat to 192.168.9.250:22
		ip daddr 147.251.50.157 tcp dport { 14022 } dnat to 192.168.9.142:22
	}
}
root@melampus:~# nft list ruleset
table ip nat {
	chain postrouting {
		type nat hook postrouting priority srcnat; policy accept;
		masquerade
	}

	chain prerouting {
		type nat hook prerouting priority dstnat; policy accept;
		ip daddr 147.251.50.157 tcp dport { 15022 } dnat to 192.168.9.250:22
		ip daddr 147.251.50.157 tcp dport { 14022 } dnat to 192.168.9.142:22
	}
}
table ip6 filter {
	chain LIBVIRT_INP {
	}

	chain INPUT {
		type filter hook input priority filter; policy accept;
		counter packets 688 bytes 49214 jump LIBVIRT_INP
	}

	chain LIBVIRT_OUT {
	}

	chain OUTPUT {
		type filter hook output priority filter; policy accept;
		counter packets 35 bytes 1960 jump LIBVIRT_OUT
	}

	chain LIBVIRT_FWO {
	}

	chain FORWARD {
		type filter hook forward priority filter; policy accept;
		counter packets 0 bytes 0 jump LIBVIRT_FWX
		counter packets 0 bytes 0 jump LIBVIRT_FWI
		counter packets 0 bytes 0 jump LIBVIRT_FWO
	}

	chain LIBVIRT_FWI {
	}

	chain LIBVIRT_FWX {
	}
}
table ip6 nat {
	chain LIBVIRT_PRT {
	}

	chain POSTROUTING {
		type nat hook postrouting priority srcnat; policy accept;
		counter packets 0 bytes 0 jump LIBVIRT_PRT
	}
}
table ip6 mangle {
	chain LIBVIRT_PRT {
	}

	chain POSTROUTING {
		type filter hook postrouting priority mangle; policy accept;
		counter packets 35 bytes 1960 jump LIBVIRT_PRT
	}
}
root@melampus:~#