Server Platform:

Distributed Authentication System (DAS) servers can run on multiple operating systems, including GNU/Linux, FreeBSD, and Solaris. Our lab has many Red Hat Linux systems, and the lab members are comfortable with Red Hat administration. The DAS described in this handbook is based on Red Hat 9.

Although using Red Hat 9 was very convenient at the time, it now leaves us with no official support for security patches. Even though the DAS servers only run a few network services, it is still important to be able to apply security patches as they are released. In the future, it may be a good idea to move to Debian GNU/Linux or FreeBSD to provide the server components of DAS. Both operating systems (and their associated developer communities) support security patches for several years, free of charge.