Полезные ссылки

• How To Set Up a Firewall Using FirewallD on CentOS 7

Запущен ли firewall

sudo systemctl start firewalld.service

​ или

firewall-cmd --state

Информация о текущих настройках firewall

• We can see which zone is currently selected as the default by typing:

firewall-cmd --get-default-zone

• Since we haven't given firewalld any …