Securing a Linux environment begins with the workstation. Whether locking down your own personal machine or securing an enterprise system, sound security policy begins with the individual computer. After all, a computer network is only as secure as the weakest node.
When evaluating the security of a Red Hat Linux workstation, consider the following:
BIOS and Boot Loader Security — Can an unauthorized user physically access the machine and boot into single user or rescue mode without a password?
Password Security — How secure are the user account passwords on the machine?
Administrative Controls — Who has an account on the system and how much administrative control do they have?
Available Network Services — What services are listening for requests from the network and should they be running at all?
Personal Firewalls — What type of firewall, if any, is necessary?
Security Enhanced Communication Tools — What tools should be used to communicate between workstations and what should be avoided?