How to Open a Port with firewalld on AlmaLinux and Rocky

sudo firewall-cmd --state

sudo dnf install firewalld
sudo systemctl enable --now firewalld

sudo firewall-cmd --get-active-zones

public
  interfaces: eth0

sudo firewall-cmd --permanent --add-service=http
sudo firewall-cmd --permanent --add-service=https
sudo firewall-cmd --reload

sudo firewall-cmd --get-services

sudo firewall-cmd --permanent --zone=public --add-rich-rule='rule family="ipv4" source address="203.0.113.10/32" port port="3306" protocol="tcp" accept'
sudo firewall-cmd --reload

sudo firewall-cmd --permanent --zone=trusted --add-source=203.0.113.10
sudo firewall-cmd --reload

sudo firewall-cmd --permanent --remove-port=8080/tcp
sudo firewall-cmd --permanent --remove-service=http
sudo firewall-cmd --reload

sudo firewall-cmd --list-all

public (active)
  target: default
  icmp-block-inversion: no
  interfaces: eth0
  sources:
  services: cockpit dhcpv6-client http https ssh
  ports: 8080/tcp 51820/udp
  protocols:
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:
	rule family="ipv4" source address="203.0.113.10/32" port port="3306" protocol="tcp" accept