Eduroam and setting identity privacy in Windows

Jim Potter j.potter at
Sat Feb 9 10:05:23 CET 2019

Hi Matthew,

Thanks for the advice on this. Yes, I think the real problem here is the
eduroam username format (uid at not being compatible with the one
that windows generates (WINSDOMAIN\uid). I figure that even though this
isn't directly freeradius related, this forum is probably still the best
place to ask PEAP related questions.

I think part of our problem here is we're trying to use eduroam for
something it wasn't designed for. If it doesn't fit, hopefully I can
convince networks to set up something else suitable instead. One thing I
have noted in the eduroam T's and C's - connections must be traceable,
generally this is interpretted as user authentication, though machine
authentication is also acceptable as long as we record logins.

I'll let you know how I get on with all this.



On Fri, 8 Feb 2019 at 16:47, Matthew Newton <mcn at> wrote:

> On Fri, 2019-02-08 at 16:36 +0000, Jim Potter wrote:
> > What I would like to achieve is authentication to happen
> > invisibly where possible - our laptops would perform machine
> > authentication, users would log in and would re-authenticate to
> > wireless invisibly (currently each user needs to set up the wireless
> > connection on each device the use - this is really bad from a user
> > experience point of view, especially for students using laptops from
> > a bank). Has anyone else had any success doing anything like this?
> So you probably need to set up EAP-TLS to authenticate using a
> certificate, rather than logging in with a username/password.
> Convenient if they're domain-joined, as the certificate handling is all
> done for you.
> > Computer authentication comes in the form
> > host/ and users in the format DOMAIN\myusername,
> > not myusername at as required by eduroam.
> You need to push group policy onto the Windows laptops to force them to
> do this. It's certainly possible from what I remember, but you're
> right, there's nothing you can do on FreeRADIUS to force this, it's a
> Windows issue.
> > I've updated the policy files on FreeRadius to authenticate the above
> > formats successfully, but if staff are to be able to use their
> > devices on remote eduroam sites, they need either their username ( at
> > least their anonymous ID/identity privacy name) to be sent in the
> > format someone at
> Exactly. Otherwise eduroam has nothing to go on when proxying the
> authentication.
> Also remember eduroam rules being you need to know who everyone is.
> That generally means that you either use usernames and passwords (and
> not a username per machine), or you use certificates and assign the
> laptop for one person to use only. It pretty much rules out shared
> laptops (unless they are used only on your own network, in which case
> of course domain based login is fine as it will also stop them from
> roaming.)
> --
> Matthew
> -
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Jim Potter
User Platform Engineer
IT Services
Bath Spa University

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