For CentOS, this is now available in the EPEL repo
mod_auth_cas (https://github.com/Jasig/mod_auth_cas) is an Apache module that plugs into the Apache mod_auth framework, to provide authentication against a Jasig CAS SSO server. Unfortunately development on it seems to have stalled, and it currently doesn’t support Apache 2.4 – https://github.com/Jasig/mod_auth_cas/issues/49. There is a fork that does support Apache 2.4, so this willl cover how to build and install it.
# Clone the forked github repo git clone https://github.com/klausdieterkrannich/mod_auth_cas.git . # install development libraries yum install gcc httpd-devel openssl-devel libcurl-devel automake # Run configure ./configure # Run Make make # If you get errors like: /opt/mod_auth_cas/missing: line 81: aclocal-1.12: command not found WARNING: 'aclocal-1.12' is missing on your system. # then symlink the binaries as follows: ln -s /usr/bin/aclocal /usr/bin/aclocal-1.12 ln -s /usr/bin/automake /usr/bin/automake-1.12 # and run make again # Assuming it built OK, then install it: make install # On CentOS this will put the binaries into: #/usr/lib64/httpd/modules # and you can then copy them from here to your production systems.