"Debian has added more security-oriented features to
the newest version of its OS. Besides the regular Debian security
support for the full archive, lenny introduces pro-active security
features to pre-emptively reduce the chance of vulnerabilities. For
example, the Debian Installer now applies any security updates
before the first boot, several security-critical packages have been
built with GCC hardening features, and the standard system contains
fewer setuid root binaries and fewer open ports.
"On the server-side, new features include support for PostgreSQL
8.3.5, MySQL 5.1.30 and 5.0.51a, GNU Compiler Collection 4.3.2,
Samba 3.2.5, Python 2.5.2 and 2.4.6, Perl 5.10.0, PHP 5.2.6,
Asterisk 220.127.116.11, Nagios 3.06 and the Xen Hypervisor 3.2.1."