we currently have a vpn 3000 concentrator that is connecting remote users, had a lightening storm that killed our Radius server, in the process of reconfiguring it. the IAS server is part of a domain and vpn users should be checked against AD for permissions. problem is that currently the users certificate is being verified and when we out in the domain username and password, the client GUI spits up an error 427. the log window from the client doeesn't really provide any helpful information. i'm assuming that the problems is with the RADIUS communicating with the AD server, but i'm pretty much stuck as to where to start looking for it. any help would be appreciated.