Document link: https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/configuring_basic_system_settings/configuring-time-synchronization_configuring-basic-system-settings#proc_enabling-nts-on-the-server_assembly_overview-of-network-time-security-in-chrony

Section number and name:  11.5.2. Enabling Network Time Security (NTS) on a time server, step 4 of procedure

Describe the issue: typo in step 4 of the procedure:

firewall-cmd --permannent --add-port={323/udp,4460/tcp}
                    ^^

Impact of this issue:

the command fails

Suggestions for improvement:

the correct parameter is --permanent

firewall-cmd --permanent --add-port={323/udp,4460/tcp}