[root@kvm3 ~]# ss -ltpn | grep 3306 LISTEN 0 80 *:3306 *:* users:(("mysqld",pid=17698,fd=22))
[root@kvm3 ~]# firewall-cmd --list-all public (active) target: default icmp-block-inversion: no interfaces: ens3 sources: services: cockpit dhcpv6-client ssh ports: protocols: masquerade: no forward-ports: source-ports: icmp-blocks: rich rules:
[root@kvm3 ~]# firewall-cmd --permanent --add-port=3306/tcp success
[root@kvm3 ~]# firewall-cmd --reload success
[root@kvm3 ~]# firewall-cmd --list-all public (active) target: default icmp-block-inversion: no interfaces: ens3 sources: services: cockpit dhcpv6-client ssh ports: 3306/tcp protocols: masquerade: no forward-ports: source-ports: icmp-blocks: rich rules: