A simple firewall-cmd cheatsheet

I tested this using CentOS 7 with firewalld service running. Get Default Zone To know the default zone, use this command firewall-cmd --get-default-zone Get Active Zones firewall-cmd --get-active-zones List Zone Services To check services, ports and settings on a specific zone, use this command firewall-cmd --zone=public --list-all Add a permanent port into a zone Adding a permanent TCP/UDP port in a specific zone. Example: opening MongoDB port firewall-cmd --permanent --zone=public --add-port=27017/tcp firewall-cmd --permanent --zone=public --add-port=27017/udp Remove a permanent port from a zone firewall-cmd --permanent --zone=public --remove-port=27017/tcp firewall-cmd --permanent --zone=public --remove-port=27017/udp Firewall-cmd reload To reflect your firewall changes....

May 27, 2018 ยท John Pili