Thanks for info. Next question is "what??" HeHe. I started looking at the files you suggested and I am confused.

First you mention looking into the realm information, did that, it is looking like that may not be to hard to do, if I am using the FR server to access the LDAP server then I just need to set a realm of ntdomain and auth=LOCAL, correct? Then you go on to say strip the domain at the LDAP lookup, well if I do it there wouldn't that fix the problem regardless of changing the realm? You go on to explain that I should do the LDAP lookup in the inner-tunnel config, I have no problem with this, it makes sense, the problem I have is how do you specify the inner tunnel in the configuration?

Remember, I am new to FreeRadius, been using Cisco ACS for a few years now so I know about Radius in general, just not how to configure FreeRadius and docs are a bit hard to come by. If you can specify the files I should look at to configure the inner tunnel authentication and where to specify stripping the domain name pre-ldap authentication that would help a lot. I was not sure if I should attempt stripping the domain in the realm portion or right before the ldap auth.

Thanks again, I will continue and try to figure out where to do this until I hear back.

Brett Littrell

Network Manager

MUSD

CISSP, CCSP, CCVP, MCNE

>>> On Friday, January 21, 2011 at 11:56 PM, in message <4D3A8DA0.7050702@deployingradius.com>, Alan DeKok <aland@deployingradius.com> wrote:

Brett Littrell wrote:
>     I am trying to strip the domain name from a userid in the most
> efficient way possible, I am using version 2.1.1.

See the "realms" module, and the "realm" definition in raddb/proxy.conf.

>      I am using MSChapV2

Then stripping the realm isn't a good idea. The User-Name is used as
part of the MS-CHAPv2 calculations, so changing it will make the
authentication fail.

>   I then found another reference to strip the domain from the LDAP
> module as shown below:
>       filter = "(cn=%{mschap:User-Name:-%{User-Name}}

This is wrong. You're not closing the opening bracket:

filter = "(cn=%{mschap:User-Name:-%{User-Name}})"

> and it seems to pass the correct username to
> the LDAP server it looks like there is some other place I need to strip
> the domain besides the ldap lookup, that or the replies are using the
> stripped name and it is failing that way as well. Either way it still
> is not working. If I un-comment the stripped-user-name and use a
> supplicant that strips the domain prior to sending it, it does work so
> Radius is working, just now with standard windows supplicant on XP.

If you're using EAP, you *really* don't want to strip the User-Name.
It will make EAP fail.

>     An yes I am pretty new to freeradius.

What you want is to change the *ldap* lookup so that it uses only the
name portion of the User-Name. *Don't* edit the User-Name.

And move the LDAP lookup to the "inner-tunnel" configuration. That's
what it's for. Don't do LDAP lookups in raddb/sites-available/default

Alan DeKok.
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