>>>>> Julio Merino writes:

Julio> Hello I'm trying to setup a secure anonymous CVS account,

Have a look at:

     http://openbsd.sunsite.ualberta.ca/papers/anoncvs-paper.ps

and if you like it, download:

    http://www.openbsd.org/anoncvs.shar

It is a small C program that you use as login shell for the anoncvs
user, it basically just chroots and then execs cvs in a safe way.

Be a bit careful with CVSREADONLYFS though (see the README), which is
an OpenBSD extension. Depending on the version of CVS you are running
you may need to use something else, e.g. the file CVSROOT/readers.

Kind regards,

        -- Urban