Hi Fulvio,
I have just stumbled across ZeroShell while setting up a network of Cisco access points and this is honestly the best work I have seen for quite some time.
It made setting up an internal CA, RADIUS/EAP-TLS, LDAPS etc a piece of cake. All things I was struggling with as there seems to be very little doco using all open source software.
Thank you for your fantastic work.