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+#!/bin/bash
+
+iprt=$1
+oprt=$2
+oipa=$3
+
+#echo 1 > /proc/sys/net/ipv4/ip_forward
+#iptables -F
+#iptables -t nat -F
+iptables -t nat -A PREROUTING -p tcp --dport $iprt -j DNAT --to-destination $oipa:$oprt
+#sudo iptables -t nat -A POSTROUTING -j MASQUERADE
+#sudo iptables -t nat -L -n -v
+#sudo iptables-persistent
+
+sudo sysctl -w net.ipv4.ip_forward=1
+sudo nft add table ip nat
+sudo nft add chain ip nat prerouting { type nat hook prerouting priority -100 \; }
+sudo nft add chain ip nat postrouting { type nat hook postrouting priority 100 \; }
+sudo nft add rule ip nat prerouting tcp dport $iprt dnat to $oipa:$oprt
+sudo nft add rule ip nat postrouting ip daddr $oipa masquerade
+sudo nft list ruleset | sudo tee /etc/nftables/port-forwarding.nft