I do not like the fact that the Server and User Certificate are accessible via the Web Interface without being required to login.
I would like to simply access the network resources from another computer without having to install OpenVPN and without having to Forward Ports on the Server
I do not always have my work computer with me and do not like to install applications onto other peoples computers.
Putty can double as a secondary VPN through its tunneling feature.
To use OpenVPN as VPN concentrator you do not require to use the X.509 certificates. The authentication can be based only on username and password (Kerberos/Radius).
In any case, Zeroshell does not support SSH tunneling.