This guide is based on various community forum posts and webpages. Special thanks to all. All comments and improvements are very welcome as this is purely a personal experimental project at this point and must be considered a work in progress.
This guide is intended as a relatively easy step by step guide to:
Harden the security on an Ubuntu 12.04 LTS server by installing and configuring the following:
Install and configure Firewall - ufw
Secure shared memory - fstab
SSH - Disable root login and change port
Protect su by limiting access only to admin group
Harden network with sysctl settings
Disable Op
Additional text has been truncated due to copyright reasons. Things without URLs and private things don't get truncated.