LDAP + Active Directory Authentication Issue

stefan.paetow at diamond.ac.uk stefan.paetow at diamond.ac.uk
Thu Dec 12 23:10:13 CET 2013


Unless you are storing passwords in Active Directory in plain text or you want to use Kerberos authentication, you will have to use MSCHAPv2 (or its EAP equivalent, EAP-MSCHAPv2).

In that case, follow http://confluence.diamond.ac.uk/display/PAAUTH/Using+Active+Directory+as+authentication+source and see if that's more useful than the URL you originally posted.

And please, post a full debug log of an authentication attempt. It's much appreciated by the gurus on the list. :-)


From: freeradius-users-bounces+stefan.paetow=diamond.ac.uk at lists.freeradius.org [freeradius-users-bounces+stefan.paetow=diamond.ac.uk at lists.freeradius.org] on behalf of Luke Ramsden [lukermsdn at gmail.com]
Sent: Thursday, December 12, 2013 6:48 PM
To: freeradius-users at lists.freeradius.org
Subject: LDAP + Active Directory Authentication Issue

Hi, I am trying to authenticate users against Active Directory using LDAP. I can perform the initial bind using an ldap bind account. I can then successfully find the Distinguished Name in Active Directory given a domain user's username. I would now like to re-bind using that Distinguished Name in order to authenticate the password they supplied as described in point 4 here:


The problem I am having is my server errors out with 'No Auth-Type found' come authentication time. I added 'set_auth_type = yes' to mods-available/ldap but it seems to have had no effect.

I am very new to this so am still finding my feet - can anyone help?

Subset of output from terminal (redacted some personal info):

(0) ldap : Performing search in 'ou=Users,dc=example,dc=domain,dc=com' with filter '(uid=example-user)'
(0) ldap : Waiting for search result...
(0) ldap : User object found at DN "CN=Name,OU=Users,DC=example,DC=domain,DC=com"
rlm_ldap (ldap): Released connection (4)
rlm_ldap (ldap): Closing connection (0): Too many free connections (5 > 3)
(0)    [ldap] = ok
(0)    [chap] = noop
(0)    [mschap] = noop
(0)    [digest] = noop
(0) suffix : No '@' in User-Name = 'example-user', looking up realm NULL
(0) suffix : No such realm "NULL"
(0)    [suffix] = noop
(0) eap : No EAP-Message, not doing EAP
(0)    [eap] = noop
(0)    [files] = noop
(0)    [expiration] = noop
(0)    [logintime] = noop
(0) WARNING: pap : No "known good" password found for the user. Not setting Auth-Type.
(0) WARNING: pap : Authentication will fail unless a "known good" password is available.
(0)    [pap] = noop
(0) } #  authorize = ok
(0) ERROR: No Auth-Type found: rejecting the user via Post Auth-Type = Reject
(0) Failed to authenticate the user.
(0) Using Post-Auth-Type Reject

Many thanks

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