The Anetd home page is http://www.sdl.sri.com/projects/activate/anetd/, where it can be downloaded free of charge. Source code is available since version 1.5, subject to the terms of the Anetd Community Software License, available from the same site.
The ABone homepage is http://www.isi.edu/abone/.
Anetd runs out-of-the-box on recent versions of FreeBSD, Linux and Solaris.
Please report porting problems and any bugs or inconsistency you found running Anetd to abocc@isi.edu).
Please also notify us of any interesting uses of Anetd in managing networked systems. (abocc@isi.edu)