Hi all, after trying Cas Server with Java Cas Client and ModCas, i'm trying phpCas on Moodle. Java client and ModCas require a certificate chain (the first) and a "vca.pem" (the second one). Without these they don't work. In phpCas there is no need to add a certificate chain or a CA cert. All works simply. So my question is: why do they need that certificate? thanks