Securing Linux Servers

Linux servers start out very secure; it's what you do with them when you use them that can create insecurities. A straight Linux server install runs minimal services and has few users and a very restrictive firewall, which is a great security posture but is pretty useless for most purposes. As users are added, services enabled, and holes punched through the firewall, the security can deteriorate quickly.

This class will show you how to maintain a strong security posture through careful configuration and proper use of Linux tools and services. Linux contains tools and software that can be enabled to slow brute-force attacks against user accounts, can notice when your accounts have weak passwords or are under attack, can keep services and software up to date, and can sandbox applications to prevent even zero-day attacks. The class will focus on attacks most recently seen, including attacks on mail and Web servers.