Mastering Linux Security and Hardening

Verifying the status of firewalld

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

[donnie@localhost ~]$ sudo firewall-cmd --staterunning[donnie@localhost ~]$

Or, 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 └─631 /usr/bin/python ...