Configuring firewalls and packet filters

Packet filters, such as firewalls, use rules to control incoming, outgoing, and forwarded traffic. Red Hat Enterprise Linux (RHEL) utilizes those mechanisms and provides different options to filter network traffic. You can use the firewalld service and the nftables framework to build complex, and performance-critical firewalls. You can also use the Express Data Path (XDP) feature of the kernel to process or drop network packets right at the network interface at a much higher rate than conventional packet filters.