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Mark Schaub

2009-Oct-14 20:00 UTC

[Dovecot] Dovecot deliver with AD LDAP userdb

Good Afternoon,

I have my virtual users stored in an Active Directory database. As far
as mail info goes the 2 important fields are: mail (their primary
email address) and otherMailbox (a multivalue attribute containing
their mail aliases). Right now all email addresses belong in the same
domain and there are no immediate plans to change this.

If I use Postfix to do the lookups and delivery only using Dovecot for
passdb Pam driver and a static userdb then everything delivers fine to
mail and otherMailbox addresses. I have been working on switching over
to Dovecot's deliver process in order to integrate sieve capability. I
have configured userdb ldap and passdb ldap in Dovecot and have set up
master and client sockets. Before I describe my problem let me show
you my configuration (as I think the dovecot-ldap.conf in particular
needs to be explained). Here are the important parts of dovecot.conf:

auth default {
  socket listen {
    master {
        path = /usr/var/run/dovecot/auth-master
        mode = 0666
        user = vmail
        group = vmail
    }

    client {
        path = /var/spool/postfix/private/auth
        mode = 0666
        user = postfix
        group = postfix
    }
 }

 passdb ldap {
    args = /etc/dovecot-ldap.conf
  }
 userdb ldap {
    # Path for LDAP configuration file, see doc/dovecot-ldap-example.conf
    args = /etc/dovecot-ldap.conf
  }

and my dovecot -n:

lda:
  postmaster_address: postmaster at sau24.org
  mail_plugins: sieve
auth default:
  mechanisms: plain login
  debug: yes
  passdb:
    driver: ldap
    args: /etc/dovecot-ldap.conf
  userdb:
    driver: ldap
    args: /etc/dovecot-ldap.conf
  socket:
    type: listen
    client:
      path: /var/spool/postfix/private/auth
      mode: 438
      user: postfix
      group: postfix
    master:
      path: /usr/var/run/dovecot/auth-master
      mode: 438
      user: vmail
      group: vmail
plugin:
  sieve: ~/.dovecot.sieve
  sieve_dir: ~/sieve
  sieve_storage: ~/sieve

Further, here is my dovecot-ldap.conf:

hosts = delldb.sau24.org:3268
base = dc=sau24, dc=org
ldap_version = 3
dn = cn=Mail User,cn=Users,dc=sau24,dc=org
dnpass = secret
auth_bind = yes
scope = subtree
user_attrs = sAMAccountName=home=/home/vmail/%$,=uid=501,=gid=501
pass_attrs = sAMAccountName=user
user_filter = (&(objectclass=person)(|(sAMAccountName=%n)(mail=%n at
sau24.org)(otherMailbox=%n at sau24.org)))
pass_filter = (&(objectclass=person)(|(sAMAccountName=%n)(mail=%n at
sau24.org)(othermailbox=%n at sau24.org)))

Now, you'll notice that the user_filter and pass_filter have the
domain statically placed after the mail and othermailbox attributes.
This reason for this is that this ldap configuration is used for both
authentication purposes and local delivery, so its not always being
passed the domain info (for authentication it gets the users IP
address). Since all my users are on the same domain I can statically
set this here. This setup authenticates users to imap and pop (users
use their sAMAccountName as their username when they log in), and
pulls their correct home directory. Checking mail is not a problem at
all.

Further, this setup will deliver mail correctly to mail addressed to
the value in the "mail" attribute. The problem seems to be in the
otherMailbox attribute, it cannot lookup the users sAMAccountName
based off of the otherMailbox field. Here is what it looks like in the
logs for mail sent to my "mail" attribute (mark.schaub at sau24.org):

Oct 14 12:36:19 auth(default): Info: master in: USER    1
mark.schaub at sau24.org   service=deliver
Oct 14 12:36:19 auth(default): Info: ldap(mark.schaub at sau24.org): user
search: base=dc=sau24, dc=org scope=subtree
filter=(&(objectclass=user)(|(sAMAccountName=mark.schaub)(mail=mark.schaub
at sau24.org)(otherMailbox=mark.schaub at sau24.org)))
fields=sAMAccountName
Oct 14 12:36:19 auth(default): Info: ldap(mark.schaub at sau24.org):
result: sAMAccountName(home=/home/vmail/%$)=/home/vmail/mschaub
Oct 14 12:36:19 auth(default): Info: master out: USER   1
mark.schaub at sau24.org   home=/home/vmail/mschaub        uid=501
gid=501
Oct 14 12:36:19 deliver(mark.schaub at sau24.org): Info: sieve:
msgid=<6b71e3a70910140936v4e8cd6fdwd847a1721a9d9786 at mail.gmail.com>:
stored mail into mailbox 'INBOX'

But this is what I get when I try to send to an address listed in my
otherMailbox field (tech at sau24.org):

Oct 14 12:30:58 auth(default): Info: master in: USER    1
tech at sau24.org  service=deliver
Oct 14 12:30:58 auth(default): Info: ldap(tech at sau24.org): user
search: base=dc=sau24, dc=org scope=subtree
filter=(&(objectclass=user)(|(sAMAccountName=tech)(mail=tech at
sau24.org)(otherMailbox=tech at sau24.org)))
fields=sAMAccountName
Oct 14 12:30:58 auth(default): Info: ldap(tech at sau24.org): Unknown user
Oct 14 12:30:58 auth(default): Info: master out: NOTFOUND       1

As a test I tried modifying my dovecot-ldap.conf to use different
fields instead of otherMailbox. Sending to some of those attributes
worked, others didnt. I could use the "sn" and "givenName"
attributes,
but "postalCode" and "title" would give the same error as
otherMailbox.

My question is this: is there something wrong with my configuration or
can Dovecot only query certain fields in the user_attr string?

Thanks,
~ Mark

mschaub at mail.sau24.org

2009-Oct-14 20:14 UTC

head link

[Dovecot] Dovecot deliver with AD LDAP userdb

> My question is this: is there something wrong with my configuration
or> can Dovecot only query certain fields in the user_attrstring?

Just as a clarification, I mean to ask if Dovecot can
only query certain fields in the user_filter string.

Thanks,
~ Mark

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Timo Sirainen

2009-Oct-15 16:28 UTC

head link

[Dovecot] Dovecot deliver with AD LDAP userdb

On Wed, 2009-10-14 at 16:00 -0400, Mark Schaub wrote:> user_filter = (&(objectclass=person)(|(sAMAccountName=%n)(mail=%n at
sau24.org)(otherMailbox=%n at sau24.org)))
My LDAP knowledge isn't that great, but does | accept more than one
parameter? Try changing this to:

user_filter = (&(objectclass=person)(|(sAMAccountName=%n)(|(mail=%n at
sau24.org)(otherMailbox=%n at sau24.org))))

Other than that, I don't really have much ideas. Does the same filter
work with e.g. ldapsearch?

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Mark Schaub

2009-Oct-16 18:18 UTC

head link

[Dovecot] Dovecot deliver with AD LDAP userdb

I have tried the user_filter you suggested, it did not change
anything. I played around with some Active Directory permissions today
and set it up so that I could perform anonymous queries and verified
that they were successful with ldapsearch on the command line. This
still didn't seem to help the problem.

As far as I can tell userdb ldap queries are run using the user
specified in dn with the password specified in dnpass. I know those
fields are correct as userdb has no problem querying users by
sAMAccountName or mail attributes. I also know that the user_filter
string works as I can run an ldapsearch using dn, dnpass, and
user_filter and that returns the correct information. For some reason
when the deliver process does this nothing is returned.

As I mentioned in the initial post, some fields work and others do
not. If I change the filter to look for sn=%n and try to deliver to my
last name then it delivers fine. If I set the filter to title=%n and
try to deliver to my title then I get the same problem as with
otherMailbox.

Is there schema information dovecot is using that defines certain
userdb attributes it can and can't use?

On Thu, Oct 15, 2009 at 12:28 PM, Timo Sirainen <tss at iki.fi>
wrote:> On Wed, 2009-10-14 at 16:00 -0400, Mark Schaub wrote:
>> user_filter = (&(objectclass=person)(|(sAMAccountName=%n)(mail=%n
at sau24.org)(otherMailbox=%n at sau24.org)))
>
> My LDAP knowledge isn't that great, but does | accept more than one
> parameter? Try changing this to:
>
> user_filter = (&(objectclass=person)(|(sAMAccountName=%n)(|(mail=%n at
sau24.org)(otherMailbox=%n at sau24.org))))
>
> Other than that, I don't really have much ideas. Does the same filter
> work with e.g. ldapsearch?
>
>

Nikita Koshikov

2009-Oct-19 06:36 UTC

head link

[Dovecot] Dovecot deliver with AD LDAP userdb

On Wed, 14 Oct 2009 16:00:54 -0400
Mark Schaub <mark.schaub at sau24.org> wrote:
> Good Afternoon,
> 
> I have my virtual users stored in an Active Directory database. As far
> as mail info goes the 2 important fields are: mail (their primary
> email address) and otherMailbox (a multivalue attribute containing
> their mail aliases). Right now all email addresses belong in the same
> domain and there are no immediate plans to change this.
> 
> If I use Postfix to do the lookups and delivery only using Dovecot for
> passdb Pam driver and a static userdb then everything delivers fine to
> mail and otherMailbox addresses. I have been working on switching over
> to Dovecot's deliver process in order to integrate sieve capability. I
> have configured userdb ldap and passdb ldap in Dovecot and have set up
> master and client sockets. Before I describe my problem let me show
> you my configuration (as I think the dovecot-ldap.conf in particular
> needs to be explained). Here are the important parts of dovecot.conf:
> 
> auth default {
>   socket listen {
>     master {
>         path = /usr/var/run/dovecot/auth-master
>         mode = 0666
>         user = vmail
>         group = vmail
>     }
> 
>     client {
>         path = /var/spool/postfix/private/auth
>         mode = 0666
>         user = postfix
>         group = postfix
>     }
>  }
> 
>  passdb ldap {
>     args = /etc/dovecot-ldap.conf
>   }
>  userdb ldap {
>     # Path for LDAP configuration file, see doc/dovecot-ldap-example.conf
>     args = /etc/dovecot-ldap.conf
>   }
> 
> and my dovecot -n:
> 
> lda:
>   postmaster_address: postmaster at sau24.org
>   mail_plugins: sieve
> auth default:
>   mechanisms: plain login
>   debug: yes
>   passdb:
>     driver: ldap
>     args: /etc/dovecot-ldap.conf
>   userdb:
>     driver: ldap
>     args: /etc/dovecot-ldap.conf
>   socket:
>     type: listen
>     client:
>       path: /var/spool/postfix/private/auth
>       mode: 438
>       user: postfix
>       group: postfix
>     master:
>       path: /usr/var/run/dovecot/auth-master
>       mode: 438
>       user: vmail
>       group: vmail
> plugin:
>   sieve: ~/.dovecot.sieve
>   sieve_dir: ~/sieve
>   sieve_storage: ~/sieve
> 
> Further, here is my dovecot-ldap.conf:
> 
> hosts = delldb.sau24.org:3268
> base = dc=sau24, dc=org
> ldap_version = 3
> dn = cn=Mail User,cn=Users,dc=sau24,dc=org
> dnpass = secret
> auth_bind = yes
> scope = subtree
> user_attrs = sAMAccountName=home=/home/vmail/%$,=uid=501,=gid=501
> pass_attrs = sAMAccountName=user
> user_filter = (&(objectclass=person)(|(sAMAccountName=%n)(mail=%n at
sau24.org)(otherMailbox=%n at sau24.org)))
> pass_filter = (&(objectclass=person)(|(sAMAccountName=%n)(mail=%n at
sau24.org)(othermailbox=%n at sau24.org)))
> 
> Now, you'll notice that the user_filter and pass_filter have the
> domain statically placed after the mail and othermailbox attributes.
> This reason for this is that this ldap configuration is used for both
> authentication purposes and local delivery, so its not always being
> passed the domain info (for authentication it gets the users IP
> address). Since all my users are on the same domain I can statically
> set this here. This setup authenticates users to imap and pop (users
> use their sAMAccountName as their username when they log in), and
> pulls their correct home directory. Checking mail is not a problem at
> all.
> 
> Further, this setup will deliver mail correctly to mail addressed to
> the value in the "mail" attribute. The problem seems to be in the
> otherMailbox attribute, it cannot lookup the users sAMAccountName
> based off of the otherMailbox field. Here is what it looks like in the
> logs for mail sent to my "mail" attribute (mark.schaub at
sau24.org):
> 
> Oct 14 12:36:19 auth(default): Info: master in: USER    1
> mark.schaub at sau24.org   service=deliver
> Oct 14 12:36:19 auth(default): Info: ldap(mark.schaub at sau24.org): user
> search: base=dc=sau24, dc=org scope=subtree
>
filter=(&(objectclass=user)(|(sAMAccountName=mark.schaub)(mail=mark.schaub
at sau24.org)(otherMailbox=mark.schaub at sau24.org)))
> fields=sAMAccountName
> Oct 14 12:36:19 auth(default): Info: ldap(mark.schaub at sau24.org):
> result: sAMAccountName(home=/home/vmail/%$)=/home/vmail/mschaub
> Oct 14 12:36:19 auth(default): Info: master out: USER   1
> mark.schaub at sau24.org   home=/home/vmail/mschaub        uid=501
> gid=501
> Oct 14 12:36:19 deliver(mark.schaub at sau24.org): Info: sieve:
> msgid=<6b71e3a70910140936v4e8cd6fdwd847a1721a9d9786 at
mail.gmail.com>:
> stored mail into mailbox 'INBOX'
> 
> But this is what I get when I try to send to an address listed in my
> otherMailbox field (tech at sau24.org):
> 
> Oct 14 12:30:58 auth(default): Info: master in: USER    1
> tech at sau24.org  service=deliver
> Oct 14 12:30:58 auth(default): Info: ldap(tech at sau24.org): user
> search: base=dc=sau24, dc=org scope=subtree
> filter=(&(objectclass=user)(|(sAMAccountName=tech)(mail=tech at
sau24.org)(otherMailbox=tech at sau24.org)))
> fields=sAMAccountName
> Oct 14 12:30:58 auth(default): Info: ldap(tech at sau24.org): Unknown user
> Oct 14 12:30:58 auth(default): Info: master out: NOTFOUND       1
> 
> As a test I tried modifying my dovecot-ldap.conf to use different
> fields instead of otherMailbox. Sending to some of those attributes
> worked, others didnt. I could use the "sn" and
"givenName" attributes,
> but "postalCode" and "title" would give the same error
as
> otherMailbox.
> 
> My question is this: is there something wrong with my configuration or
> can Dovecot only query certain fields in the user_attr string?
> 
> Thanks,
> ~ Mark
Not sure, if it helps, but you are trying to do "mta's" work by
dovecot delivery.
Your postfix setup must do lookups for mail aliases and return REAL mailbox
name(mail ldap field).
I'm using Exim as MTA - it is working fine. I have 1 router, which resolves
'othermailbox' ldap field to 'mail' field and after that the
dovecot delivery is running.
With such setup my users are able to use sieve, but authentication can be done
only by real mailboxes.
Postfix must have some mechanisms to makes it work this way.

Note: 
mail must have user at domain - if you want to use multiply domains.
othermail should be user2 at domain to restrict alias mapping to one certain
domain in multidomain setup.

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