Keeping Up with Security on Your Systems

The best defense in Linux security—as with any system security, regardless of the operating system—is a layered defense. As such, developers are working toward improvements in every layer of that defense. Three areas in that regard are as follows:

  • The development of a new firewall-management system, which is a successor to the iptables command

  • Additional work on mandatory access control systems, both Security Enhanced Linux (SELinux) and Application Armor (AppArmor)

  • Updates to penetration-testing tools, including the open-source nmap command

A New Firewall Command

The iptables command was introduced in 2001. Although it will help protect Linux systems years into the future, the rules associated with ...

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