The TUX web server is an unmaintained in-kernel web server for Linux licensed under the GNU General Public License (GPL). It was maintained by Ingo Molnár.
It was limited to serving static web pages and coordinating between kernelspace modules, userspace modules, and regular userspace web server daemons that provide dynamic content. Regular userspace web servers do not need to be altered in any way for TUX to coordinate with them. However, userspace code has to use a new interface based on the tux(2) system call.