rubycas client configuration options in config/envirement.rb
[more details] (https://github.com/rubycas/rubycas-client)
# enable detailed CAS logging
cas_logger = CASClient::Logger.new(::Rails.root+'/log/cas.log')
cas_logger.level = Logger::DEBUG
CASClient::Frameworks::Rails::Filter.configure(
:cas_base_url => "https://cas.example.foo/",
:login_url => "https://cas.example.foo/login",