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→Part 1: Replacing firewalld with iptables
# Install the ''iptables-services'' package: <code>yum install iptables-services</code>
# Stop the ''firewalld'' service and start the ''iptables'' service in a single, chained command: <code> systemctl stop firewalld; systemctl start iptables</code>(Note: If firewalld isn't present on your system, you'll get a ''not loaded'' error. This is fine. You can move on to Step 4.)
# Check the status of the firewalld service. It should tell you it's stopped.
# Check the status of the iptables service. It should tell you it's '''active'''.