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| systemctl status firewalld
firewall-cmd -state
firewall-cmd --get-zones
firewall-cmd --zone=work --list-all
firewall-cmd --get-default-zone
firewall-cmd --set-default-zone=work
firweall-cmd --list-services
firewall-cmd --add-service=http --permanent
firewall-cmd -reload
firewall-cmd --remove-service=http --permanent
firewall-cmd --reload
firweall-cmd --add-port=331/tcp --permanent
firewall-cmd --reload
firweall-cmd --remove-port=331/tcp --permanent
firewall-cmd --reload
systemctl stop firewalld
systemctl disable firewalld
firewall-cmd --state
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