IPtables rules are just another config file. As such, use puppet (or equivalent) to manage them. I'm fairly indifferent to the likes of Shorewall. They're nice for creating complex rulesets on gateway ...

When you use IPTables to create a firewall for your company's Web server, one way to prevent certain users from accessing the server is to block their IP addresses. Use the "iptables" command to ...

In my last column, I sang the praises of application-layer proxy firewalls and introduced Balazs Scheidler's Zorp firewall suite, available in both commercial and free-of-charge versions. This column ...

We are currently running a RHEL6 shop that is provisioned from soup to nuts with Chef. We are beginning to migrate to RHEL7 and of course systemd and firewalld. Our existing provisioning code is ...