Enable the Linux Firewall iptables

Enable the iptables firewall service so the STA installer can set up required port configurations. Once STA is installed, iptables must remain running to support internal port forwarding for SNMP traps.

Open a terminal session on the STA server and log in as the system root user.
Enable the iptables:
1. Check the current status of the iptables service.
```
# systemctl status iptables
```
2. If the firewall is not running, start and enable it.
```
# systemctl start iptables
# systemctl enable iptables
```