At my university of applied sciences the OpenVPN-Traffic is blocked by the internal WLAN. So you could set up your OpenVPN server like this:
http://www.vpntutorials.com/tutorials/openvpn-sharing-a-port-with-a-webserver-on-port-80-443/
This sucessfully bypasses the firewall and all VPN traffic will go trough….
Thats why education costs 100000000000$$$$$