I set up MAC address filtering on my VZW router for security reasons with my job. They told me I couldn't have the wifi enabled while using a VPN for some reason. I think they're idiots, am I wrong?

We have a Procurve 2510G that we want to do basic MAC filtering on i.e. only allow machines with a MAC of xyz to connect to Ports X-Y. Seems with the port-security command that there is an ...