EAP with FreeRadius and Azure Active Directory

Adam Bishop Adam.Bishop at jisc.ac.uk
Fri Sep 2 09:51:32 CEST 2016

On 2 Sep 2016, at 08:06, Scott Armitage <S.P.Armitage at lboro.ac.uk> wrote:
> I haven’t used Azure but a quick google suggests RADIUS Authentication and Azure Multi-Factor Authentication Server.  This seems to suggest you proxy the inner tunnel (MSCHAPv2) to the Azure MFA server.  Doesn’t seem very secure to me proxying MSCHAPv2 across the Internet.
> https://azure.microsoft.com/en-gb/documentation/articles/multi-factor-authentication-get-started-server-radius/

I can't find the code right now but it was fairly easy to write a shim that authenticated against Azure AD using OAUTH or SAML.

Off the top of my head, I created a dummy native application and used C# ADAL to obtain a token or assertion using the users credentials (via TTLS/PAP) and verify the validity.

FreeRADIUS just called the binary in the same way as ntlm_auth.


Adam Bishop

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