Hi again

I'm trying to authenticate a user against an LDAP Server (well, our AD, but it can LDAP).

This is my configuration:

hosts = my.server.local
auth_bind = yes
ldap_version = 3
base = CN=Person,CN=Schema,CN=Configuration,DC=company,DC=local
scope = subtree
user_attrs = \
  =home=/home/imapproxy/%u, \
  =mail=maildir:/home/imapproxy/%u

pass_attrs = uid=%u, userPassword=%w
pass_filter = (&(objectClass=user)(sAMAccountName=%u))
auth_bind_userdn = company\%u

If I try to login on the LDAP-Server using ldapsearch it works, but with Dovecot not...
I see this in my log:

Jun 22 16:14:08 proxy01 dovecot: auth: Debug: client in: AUTH#0111#011PLAIN#011service=imap#011secured#011session=+agW4xsZ4gAKADPG#011lip=10.0.46.4#011rip=10.0.51.198#011lport=143#011rport=34018#011resp=<hidden> Jun 22 16:14:08 proxy01 dovecot: auth: Debug: client passdb out: OK#0111#011user=bertoncello Jun 22 16:14:08 proxy01 dovecot: auth: Debug: master in: REQUEST#0111586495489#01117122#0111#01161785e0770d6c48e7316ab484bc2778c#011session_pid=17125#011request_auth_token Jun 22 16:14:08 proxy01 dovecot: auth: Debug: ldap(bertoncello,10.0.51.198,<+agW4xsZ4gAKADPG>): user search: base=CN=Person,CN=Schema,CN=Configuration,DC=company,DC=local scope=subtree filter=(&(objectClass=posixAccount)(uid=bertoncello)) fields= Jun 22 16:14:08 proxy01 dovecot: auth: Error: ldap(bertoncello,10.0.51.198,<+agW4xsZ4gAKADPG>): ldap_search(base=CN=Person,CN=Schema,CN=Configuration,DC=company,DC=local filter=(&(objectClass=posixAccount)(uid=bertoncello))) failed: Operations error Jun 22 16:14:08 proxy01 dovecot: auth: Debug: master userdb out: FAIL#0111586495489 Jun 22 16:14:08 proxy01 dovecot: imap: Error: Internal auth failure (client-pid=17122 client-id=1) Jun 22 16:14:08 proxy01 dovecot: imap-login: Internal login failure (pid=17122 id=1) (internal failure, 1 successful auths): user=<bertoncello>, method=PLAIN, rip=10.0.51.198, lip=10.0.46.4, mpid=17125, TLS, session=<+agW4xsZ4gAKADPG>

and if I sniff with ngrep the comunication with the AD I see:

####
T 10.0.46.4:58761 -> 192.168.168.23:389 [AP]
  0....`........
#
T 192.168.168.23:389 -> 10.0.46.4:58761 [AP]
  0........a............
##
T 10.0.46.4:58761 -> 192.168.168.23:389 [AP]
  0#...`......company\bertoncello..secret
#
T 192.168.168.23:389 -> 10.0.46.4:58761 [AP]
  0........a............
##
T 10.0.46.4:58761 -> 192.168.168.23:389 [AP]
  0....`........
#
T 192.168.168.23:389 -> 10.0.46.4:58761 [AP]
  0........a............
#
T 10.0.46.4:58761 -> 192.168.168.23:389 [AP]
0.....c{.5CN=Person,CN=Schema,CN=Configuration,DC=company,DC=local................1....objectClass..posixAccount....uid..bertoncello0.
#
T 192.168.168.23:389 -> 10.0.46.4:58761 [AP]
0........e................000004DC: LdapErr: DSID-0C0906E8, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v1db1.
##
T 10.0.46.4:58761 -> 192.168.168.23:389 [AP]
  0....B.
###
T 192.168.168.23:389 -> 10.0.46.4:58761 [AR]
  ..

and I can't understand why:

1) I read "objectClass..posixAccount"
2) The authentication does not work...

Thanks for your help!
Luca Bertoncello
(lucab...@lucabert.de)

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