Mastering Linux Security and Hardening - Second Edition

An overview of firewalld

In a typical business setting, especially in larger enterprises, you may encounter various types of firewalld in various places that can provide various types of functionality. Some examples are as follows:

• Edge devices that separate the internet from an internal network translate routable public IP addresses to non-routable private IP addresses. They can also provide various types of access control to keep out unauthorized people. By also providing various types of packet inspection services, they can help prevent attacks on the internal network, keep out malware, and prevent leakage of sensitive information from the internal network to the internet.
• Large enterprise networks are normally divided into subnetworks, ...