Answering to CAS proxy requests as CAS Provider
There is an error when calling the /cas/proxy endpoint:
==> /var/log/apache2/error.log <==
[info] No cookie found
[debug] Build URL https://auth.openid.club/cas/proxy?targetService=http://webmail&pgt=PGT-a599b067f64773560dcca4fd0dd3ccfa
[debug] Redirect 192.168.100.1 to portal (url was /cas/proxy?targetService=http://webmail&pgt=PGT-a599b067f64773560dcca4fd0dd3ccfa)
[debug] User not authenticated, Try in use, cancel redirection
[debug] Start routing cas
Bad response 2 at /usr/share/perl5/Plack/Handler/FCGI.pm line 156.
[Fri May 11 21:49:25.545901 2018] [core:error] [pid 103079] [client 192.168.100.1:48558] End of script output before headers: index.fcgi