// Aula 1 - Compreendendo o Firewalld

https://firewalld.org/documentation/man-pages/firewalld.zones.html

# firewall-cmd --get-services

# cd /usr/lib/firewalld/services

# cat ftp.xml

# firewall-cmd

# firewall-cmd --get-default-zone

# firewall-cmd --get-services

# firewall-cmd --list-services

# firewall-cmd --list-all

# firewall-cmd --list-all --zone=public

# firewall-cmd --add-service=vnc-server

# firewall-cmd --list-all

# systemctl restart firewalld 

# firewall-cmd --list-all

# firewall-cmd --add-service vnc-server --permanent

# firewall-cmd --list-all

# firewall-cmd --reload

# firewall-cmd --add-port=2022/tcp --permanent

# firewall-cmd --reload

# firewall-cmd --list-all