It is built around modules, which have an interface to the configuration files and the Webmin server. This makes it easy to add new functionality. Due to Webmin's modular design, it is possible for anyone who is interested to write plugins for desktop configuration. Webmin also allows for controlling many machines through a single interface, or seamless login on other webmin hosts on the same subnet or LAN. Webmin is primarily coded by Australian Jamie Cameron and released under the BSD license.