Part 2: Adding the firewall rules

In part two of this series we’re going to discuss adding firewall rules to the router.  Everyone knows that adding ingress (or incoming) firewall rules is important to securing your network.  However, the same can be said for adding egress rules for traffic leaving your network.  For instance, aside from an email server, no client should ever send traffic to the Internet via TCP port 25.  If you see

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RHEL/CentOS Server Security

As a part of the sys admin’s job, it is important to take a few extra minutes to go through and properly secure a newly installed Linux server. These steps include enabling SELinux on the machine, configuring the firewall, and setting user permissions. There are however additional steps one should take in order to secure their server. One would be to tune and secure kernel parameters, set limits on

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