Linux Configure Firewall Using Shorewall Under RHEL / CentOS

Posted on in Categories , , last updated December 20, 2012

A properly configured firewall can greatly increase the security of RHEL / CentOS based system. How do I configure a shorewall based firewall for CentOS or Red Hat Enterprise Linux system with an Internet connection? How do I install and configure shorewall to protect the following small business network?