# firewall-cmd --add-forward-port=port=port-number:proto=tcp|udp|sctp|dccp:toport=port-number
sudo firewall-cmd --query-masquerade # 查詢有IP 偽裝
sudo firewall-cmd --permanent --zone=public --add-masquerade
sudo firewall-cmd --permanent --zone=public --add-forward-port=port=33822:proto=tcp:toport=22:toaddr=203.74.221.35
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