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.