Mastering Linux Security and Hardening - Second Edition

Verifying the status of firewalld

Let's start by verifying the status of firewalld. There are two ways to do this. For the first way, we can use the --state option of firewall-cmd:

[donnie@localhost ~]$ sudo firewall-cmd --state running [donnie@localhost ~]$

Alternatively, if we want a more detailed status, we can just check the daemon, the same as we would any other daemon on a systemd machine:

[donnie@localhost ~]$ sudo systemctl status firewalld firewalld.service - firewalld - dynamic firewall daemon  Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)  Active: active (running) since Fri 2017-10-13 13:42:54 EDT; 1h 56min ago  Docs: man:firewalld(1)  Main PID: 631 (firewalld) CGroup: /system.slice/firewalld.service ...