Alex Banh, CEO of Sun Wah Linux, explained to internetnews.com that the Rays ES development was first based on Sarge “unstable” and was adjusted when Sarge was officially released.

Rays ES includes the 2.6.11 Linux kernel built with an improved access control list (ACL) functionality. ACL enables systems administrators a more granular level of permissions and control to directories and files than a typical Linux system. Sun Wah has also added a kernel-level security system that it claims is an effective tool for preventing buffer overflow attacks.

Sun Wah's enterprise Debian is also chock full of the typical Linux server functionality, including Apache, Samba, MySQL (database), Squid (proxy), BIND (DNS), firewall and e-mail server functionality.