July 28

Sendmail rejected — Default CentOS Installation

——————————————————————— – OVERVIEW / THOUGHT PROCESS – ——————————————————————— After completing a brand new minimal install of CentOS 6.4, I configured the installation to be a web server using apache, mysql and sshd for remote access.  After configuring a website on the box, I attempted to send an email from the local webpage, but never received.

May 15

IP Tables (explanation in efficiency)

——————————————————————— – OVERVIEW / THOUGHT PROCESS – ——————————————————————— IP Tables are a set of rules that you define to allow or reject network traffic from entering into your system. The ones that I am referring to are for a UNIX (Linux) type system. ¬†As a default, the IP Tables specify what’s called an ‘implicit deny’.