I know how to setup a firewall under RHEL / Fedora and CentOS Linux quickly. How do I setup a host-based firewall under Debian or Ubuntu Linux server or desktop system? How do I install Shoreline firewall (Shorewall) utility to build firewall based on the Netfilter under Debian or Ubuntu Linux?
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?