Hi Mark,
Just to let you know that we are running dovecot with AD. (and I guess: *many* people are running that combination)
It worked without issues, we are using in dovecot-ldap.conf.ext:
auth_bind = yes
this user/passwd filter:
= (&(objectclass=person)(sAMAccountName=%n)(!(userAccountControl=514)))
dn = cn=search_dovecit,cn=users,dc=company,dc=com dnpass = top_secret
And not the 3268 port, but regular 389.
Hope that helps.
MJ
On 12/04/2017 01:38 AM, Mark Foley wrote:
Unfortunately, I tried for weeks to figure out passdb ldap without success. I guess I'm just not knowledgeable enough about how to use ldap and Active Directory. The dovecot wiki https://wiki2.dovecot.org/AuthDatabase/LDAPm doesn't help me much. All it says is:
Active Directory
When connecting to AD, you may need to use port 3268. Then again, not all LDAP fields are available in port 3268. Use whatever works. http://technet.microsoft.com/en-us/library/cc978012.aspx
I have not been able to find an example of someone using Dovecot and ldap with AD.
However, I have had some success with CheckPassword (https://wiki2.dovecot.org/AuthDatabase/CheckPassword). Using a program I wrote to do ntlm_auth, I am able to authenticate the smartPhone user and pass the required parameters back to Dovecot. My auth-checkpasswd.conf.ext is the as-shipped standard except pointing to my checkpassword executable.
passdb { driver = checkpassword args = /user/util/bin/checkpassword } userdb { driver = prefetch }
The one issue I have with this at the moment is that dovecot runs checkpassword for every user, smartphone or otherwise:
Dec 03 18:56:32 auth-worker(14903): Info: shadow(charmaine,192.168.0.52,
): unknown user - trying the next passdb Dec 03 18:56:32 auth: Debug: checkpassword(charmaine,192.168.0.52, ): execute: /user/util/bin/checkpassword /usr/local/libexec/dovecot/checkpassword-reply Dec 03 18:56:32 auth: Debug: checkpassword(charmaine,192.168.0.52, ): Received input: Dec 03 18:56:32 auth: Debug: checkpassword(charmaine,192.168.0.52, ): exit_status=1 Dec 03 18:56:32 auth: Debug: checkpassword(charmaine,192.168.0.52, ): Credentials: Dec 03 18:56:32 auth: Debug: client passdb out: OK 1 user=charmaine original_user=charmaine@HPRS.LOCAL Dec 03 18:56:32 auth: Debug: master in: REQUEST 1884160001 14902 1 586863e54c57c999ee5731906a59257c session_pid=14907 request_auth_token Dec 03 18:56:32 auth-worker(14903): Debug: passwd(charmaine,192.168.0.52, ): lookup Dec 03 18:56:32 auth-worker(14903): Debug: passwd(charmaine,192.168.0.52, ): username changed charmaine -> HPRS\charmaine Dec 03 18:56:32 auth: Debug: master userdb out: USER 1884160001 HPRS\charmaine system_groups_user=HPRS\charmaineuid=10003 gid=10000 home=/home/HPRS/charmaine auth_token=d8d39ec4cc71923806ca7f539427e8aac44e90f7 auth_user=charmaine@HPRS.LOCAL Dec 03 18:56:32 imap-login: Info: Login: user=<charmaine>, method=GSSAPI, rip=192.168.0.52, lip=192.168.0.2, mpid=14907, TLS, session= Dec 03 18:56:50 auth: Debug: auth client connected (pid=14913) Notice after the "shadow" auth fails it says, "unknown user - trying the next passdb", which is checkpassword (which apparently succeeds), then it goes on to gssapi which also succeeds. Is there a way to only have it do checkpassword if all shadow and gssapi fail? My mechanisms are:
auth_mechanisms = plain login gssapi
THX, --Mark
--Mark
-----Original Message----- Date: Sun, 03 Dec 2017 22:28:53 +0200 Subject: Re: Howto authenticate smartPhone via Active Directory From: Aki Tuomi aki.tuomi@dovecot.fi To: Mark Foley mfoley@ohprs.org, dovecot@dovecot.org
with passdb ldap i guess.
---Aki Tuomi Dovecot oy
-------- Original message -------- From: Mark Foley mfoley@ohprs.org Date: 03/12/2017 21:18 (GMT+02:00) To: dovecot@dovecot.org Subject: Re: Howto authenticate smartPhone via Active Directory
Yes, you are right. This link: https://www.redips.net/linux/android-email-postfix-auth/#section2 shows:
passdb pam { }
used for authenticating Android. Problem #1 is that Slackware does not ship with PAM and the AD/DC Samba4 does not use it. It is used on Slackware for a domain member, but I'm not sure I should try configuring PAM on the AD/DC.
Is there some otherway I can get authentication using domain credentials besides pam? the phone can send user and password.
--Mark
-----Original Message-----
Date: Sun, 03 Dec 2017 15:22:56 +0200 Subject: Re: Howto authenticate smartPhone via Active Directory From: Aki Tuomi aki.tuomi@dovecot.fi To: Mark Foley mfoley@ohprs.org, dovecot@dovecot.org
Actually you are authenticating gssapi clients from ad and everyone else from shadow. maybe you need to configure pam module? ---Aki TuomiDovecot oy
-------- Original message -------- From: Mark Foley mfoley@ohprs.org Date: 03/12/2017 06:03 (GMT+02:00) To: dovecot@dovecot.org Subject: Howto authenticate smartPhone via Active Directory
I have a Samba4 Active Directory server. Dovecot authenticates AD Users with domain credentials using GSSAPI (Thunderbird client). I believe I have Dovecot set to attempt authentication via shadow first and. failing that, it does authenticate via GSSAPI.
Smartphones connect to Dovecot via port 143 and SSL. They are not domain members so if the shadow authentication fails, no other methods are tried and no connection is made.
What can I do with my dovecot config to fix this?
doveconf -n # 2.2.15: /usr/local/etc/dovecot/dovecot.conf # OS: Linux 4.4.88 x86_64 Slackware 14.2 auth_debug = yes auth_debug_passwords = yes auth_gssapi_hostname = $ALL auth_krb5_keytab = /etc/dovecot/dovecot.keytab auth_mechanisms = plain login gssapi auth_use_winbind = yes auth_username_format = %n auth_verbose = yes auth_verbose_passwords = plain disable_plaintext_auth = no info_log_path = /var/log/dovecot_info mail_location = maildir:~/Maildir passdb { driver = shadow } protocols = imap ssl_cert =
Thanks, Mark