The only valid values for minVersion are 0 and 1. A value of zero (0) indicates that the Application Server will not validate incoming requests. Requests will still be authenticated, but will not be verified to be coming from a valid source. A value of one (1) is the only supported validation level.
Setting minVersion to 1 will force the Application Server to validate that incoming requests are coming from a valid source. Note that if older clients that do not support request validation are communicating to the Application Server, and minVersion is set to anything other than zero (0), those clients will not be able to communicate to the Application Server. If there are clients older than the release version of the Application Server that will not be upgraded, you should leave this value at zero (0).