Here is a list of all the content that has been tagged as (Mail Transfer Agent) mta.
A three part book series focused on lifting the security knowledge of Software Developers, Engineers, and their teams, so that they can continuously deliver secure technical solutions on time and within budget, without nasty surprises.
First book is complete, second book is content complete and currently in technical review.
Redirects to legacy blog post. These are the steps I took to set-up and harden a Debian web server before being placed into a DMZ and undergoing additional hardening before opening the port from the WWW to it. Most of the steps below are fairly simple to do, and in doing so, remove a good portion of the low hanging fruit for nasty entities wanting to gain a foot-hold on your server-network.