Linux firewalls: what you need to know about iptables and firewalld(opensource.com)
opensource.com
Linux firewalls: what you need to know about iptables and firewalld
https://opensource.com/article/18/9/linux-iptables-firewalld
1 comments
The first thing I do on any server is mask firewalld and enable the legacy iptables service. Servers do not need firewalld and many other laptop features implemented under systemd.