Configuring firewalls and packet filters

Packet filters, such as firewalls, use rules to control incoming, outgoing, and forwarded network traffic. In Red Hat Enterprise Linux (RHEL), you can use the `firewalld` service and the `nftables` framework to filter network traffic and build performance-critical firewalls. You can also use the Express Data Path (XDP) feature of the kernel to process or drop network packets at the network interface at a very high rate.