linux firewall add port code example
Example 1: firewall-cmd add port 8080
sudo firewall-cmd --zone=public --permanent --add-port=5000/tcp
sudo firewall-cmd --zone=public --permanent --add-port=4990-4999/udp
sudo firewall-cmd --zone=public --permanent --list-ports
Example 2: open firewall port in linux
Debian: sudo ufw allow PORT. CentOS: sudo firewall-cmd --zone=public --permanent --add-port=PORT/tcp sudo firewall-cmd --reload