A pekne, ze sa zvysuje bezpecnost aj napriek tomu, ze to nie je az take potrebne, napr.:
----------------------
Firewall
Ubuntu 8.04 Beta includes ufw (Uncomplicated Firewall), a new host-based firewall application configurable from the command line which is designed to make administering a firewall easier for end users while not getting in the way of network administrators.
----------------------
Memory Protection
Additional access checks have been added so that /dev/mem and /dev/kmem can only be used to access device memory. These changes will help defend against rootkits and other malicious code.
The lower 64K of system memory is no longer addressable by default. This will help defend against malicious code that attempts to leverage kernel bugs into security vulnerabilities.
Applications compiled as Position Independent Executables (PIE) are now placed into memory in unpredictable locations, making it harder for security vulnerabilities to be exploited