Installation and update (Docker)Installation Guide (Linux Engine)Additional proceduresPort 443 releaseVersion: 2.2.0On this pagePort 443 releaseCentOS​ To free port 443 on CentOS distributions, run the following commands: firewall-cmd --permanent --zone=public --add-port=443/tcpfirewall-cmd --reload Ubuntu​ To free port 443 on CentOS distributions, run the following commands: sudo ufw allow 443/tcpsudo ufw reload