HELP: Windows IAS / FreeRADIUS Proxy problem

[clive gould]

Can anybody help please?

We use a FreeRADIUS proxy for authenticating DSpace with MS AD via MS IAS

Our ITNS team have just rebuilt the IAS server after it suffered a
hardware failure failed and since the rebuild it is now rejecting
FreeRADIUS proxy requests. IAS will still respond to my Moodle PHP
RADIUS authentication module, but since the rebuild is rejecting
authentication requests from the FreeRADIUS proxy (yes the new shared
secret is correct and I'm logging on with the same id to
both systems :)

I'm using MSCHAP for authentication with FreeRADIUS.

I am wondering if the problem could be to do with
http://technet.microsoft.com/en-us/library/cc786978.aspx#BKMK_5 ?

Comments/suggestions very gratefully received :)))

Thanks

Clive