Centos 7

# lihat zone port
sudo firewall-cmd --get-active-zones

# add port tambahkan ke zone sesuai pilihan
sudo firewall-cmd --zone=public --permanent --add-port=30069/tcp
sudo firewall-cmd --reload

# list port
sudo firewall-cmd --list-ports
sudo firewall-cmd --list-all

# check port is running
netstat -tulpn | grep :1000