Looking for NTLM config example

aki.tuomi at dovecot.fi
Sun, 26 Jun 2016 11:00:49 -0000

It should work. Although if you are using linux server you might want to use
gssapi instead.

> On June 25, 2016 at 7:43 PM Mark Foley <mfoley at ohprs.org> wrote:
>
>
> I've asked this several times over the past year with essentially zero
responses. I'll keep it simple:
>
> Does NTLM authentication work in Dovecot?
>
> I'll post this one last time. If I still have no responses I'll
have to conclude that no one
> has actually tried this authentication method and it therefore does not
work.
>
> Thanks, --Mark
>
> -----Original Message-----
> From: Mark Foley <mfoley at ohprs.org>
> Date: Fri, 22 Apr 2016 02:07:24 -0400
> Organization: Ohio Highway Patrol Retirement System
> To: dovecot at dovecot.org
> Subject: Looking for NTLM config example
>
> > Now that I am running Thunderbird on Linux and away from
Windows/Outlook, I'd like to take
> > another run at setting up NTLM authentication from Thunderbird to my
Samba4 AC/DC.
> >
> > With the help of the samba maillist folks I was able to set up NTLM
authentication for domain
> > user login.  I should be able to do the same for email!
> >
> > But, I need help. I went to
http://wiki2.dovecot.org/Authentication/Mechanisms/NTLM and got
> > lost immediately. Are "authenticaion submethods" synonymous
with "password schemes"? The 7th
> > line down says, "NTLM password scheme is required for NTLM, NTLM2
and NTLMv2.", but in the
> > referenced link I found no reference to "NTLM password
scheme".
> >
> > The links http://wiki2.dovecot.org/Authentication/Mechanisms/NTLM and
> > http://wiki2.dovecot.org/Authentication/PasswordSchemes, tell you what
the 4 NTLM
> > authentication submethods are, tells you what password schemes are,
tells you what the NTLM
> > client/server handshake is, but doesn't actually tell you how to
configure dovecot config
> > files.  I'm much more interested in the "how to" than
in: "NTLMv2: server and client nonce,
> > MITM can't force downgrade" ...  whatever that means.
> >
> > Anyway, probably it's my lack of understanding terminology.  I
don't even know what a "nonce"
> > is.  But, I learn well from examples! Can somone please give me a
sample 10-auth.conf for NTML
> > and any other supporting settings or configs I need?
> >
> > My current/working dovecot settings, which have been running perfectly
for well over a year
> > now, are:
> >
> > $ dovecot -n
> > # 2.2.15: /usr/local/etc/dovecot/dovecot.conf
> > # OS: Linux 3.10.17 x86_64 Slackware 14.1
> > auth_debug_passwords = yes
> > auth_mechanisms = plain login
> > 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 =
</etc/ssl/certs/OHPRS/GoDaddy/Apache/2015-08-14/57aa6ed6ae98b4c7.crt
> > ssl_key = </etc/ssl/certs/OHPRS/GoDaddy/my.server.name.key
> > userdb {
> >   driver = passwd
> > }
> > verbose_ssl = yes
> >
> >
> > Here's what I've tried so far as 10-auth.conf:
> >
> > disable_plaintext_auth = no
> > auth_use_winbind = yes
> > info_log_path = /var/log/dovecot_info
> > auth_verbose = yes
> > auth_debug_passwords = yes
> > auth_verbose_passwords= plain
> > auth_winbind_helper_path = /usr/bin/ntlm_auth
> >
> > auth_mechanisms = ntlm plain login
> >
> > userdb {
> >   driver = passwd
> >   args = username_format=%n allow_all_users=yes
> >
> > }
> >
> >
> > Which gives me a dovecot -n of:
> >
> > $ dovecot -n
> > # 2.2.15: /usr/local/etc/dovecot/dovecot.conf
> > # OS: Linux 3.10.17 x86_64 Slackware 14.1
> > auth_debug_passwords = yes
> > auth_mechanisms = ntlm plain login
> > auth_use_winbind = yes
> > auth_verbose = yes
> > auth_verbose_passwords = plain
> > disable_plaintext_auth = no
> > info_log_path = /var/log/dovecot_info
> > mail_location = maildir:~/Maildir
> > protocols = imap
> > ssl_cert =
</etc/ssl/certs/OHPRS/GoDaddy/Apache/2015-08-14/57aa6ed6ae98b4c7.crt
> > ssl_key = </etc/ssl/certs/OHPRS/GoDaddy/my.server.name.key
> > userdb {
> >   args = username_format=%n allow_all_users=yes
> >   driver = passwd
> > }
> > verbose_ssl = yes
> >
> >
> > I configured Thunderbird for NTLM authentication, then tried sending a
message, I got the
> > following in /var/log/dovecot_info:
> >
> > Apr 22 01:37:57 imap-login: Debug: SSL: elliptic curve secp384r1 will
be used for ECDH and ECDHE key exchanges
> > Apr 22 01:37:57 imap-login: Debug: SSL: elliptic curve secp384r1 will
be used for ECDH and ECDHE key exchanges
> > Apr 22 01:37:57 auth: Debug: Loading modules from directory:
/usr/local/lib/dovecot/auth
> > Apr 22 01:37:57 imap-login: Info: Disconnected: Auth process broken
(disconnected before auth was ready, waited 0 secs): user=<>,
rip=192.168.0.58, lip=98.102.63.107, session=<xFuyOgwx9wDAqAA6>
> >
> >
> > On Thunderbird I got the error, "Sending of the message failed.
The Outlgoing server (SMTP)
> > my.server.name does not support the selected authentication method.
Please change the
> > 'Autnentication method' in 'Account Settings | Outgoing
Server (SMTP)'."
> >
> > Clearly, something is configured wrong, but I've no clue what.
> >
> > Can I get some advice?
> >
> > THX --Mark
> From dovecot-bounces at dovecot.org  Fri Apr 22 02:07:47 2016
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> From: Mark Foley <mfoley at ohprs.org>
> Date: Fri, 22 Apr 2016 02:07:24 -0400
> Organization: Ohio Highway Patrol Retirement System
> To: dovecot at dovecot.org
> Subject: Looking for NTLM config example
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> Status: R
>
> Now that I am running Thunderbird on Linux and away from Windows/Outlook,
I'd like to take
> another run at setting up NTLM authentication from Thunderbird to my Samba4
AC/DC.
>
> With the help of the samba maillist folks I was able to set up NTLM
authentication for domain
> user login.  I should be able to do the same for email!
>
> But, I need help. I went to
http://wiki2.dovecot.org/Authentication/Mechanisms/NTLM and got
> lost immediately. Are "authenticaion submethods" synonymous with
"password schemes"? The 7th
> line down says, "NTLM password scheme is required for NTLM, NTLM2 and
NTLMv2.", but in the
> referenced link I found no reference to "NTLM password scheme".
>
> The links http://wiki2.dovecot.org/Authentication/Mechanisms/NTLM and
> http://wiki2.dovecot.org/Authentication/PasswordSchemes, tell you what the
4 NTLM
> authentication submethods are, tells you what password schemes are, tells
you what the NTLM
> client/server handshake is, but doesn't actually tell you how to
configure dovecot config
> files.  I'm much more interested in the "how to" than in:
"NTLMv2: server and client nonce,
> MITM can't force downgrade" ...  whatever that means.
>
> Anyway, probably it's my lack of understanding terminology.  I
don't even know what a "nonce"
> is.  But, I learn well from examples! Can somone please give me a sample
10-auth.conf for NTML
> and any other supporting settings or configs I need?
>
> My current/working dovecot settings, which have been running perfectly for
well over a year
> now, are:
>
> $ dovecot -n
> # 2.2.15: /usr/local/etc/dovecot/dovecot.conf
> # OS: Linux 3.10.17 x86_64 Slackware 14.1
> auth_debug_passwords = yes
> auth_mechanisms = plain login
> 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 =
</etc/ssl/certs/OHPRS/GoDaddy/Apache/2015-08-14/57aa6ed6ae98b4c7.crt
> ssl_key = </etc/ssl/certs/OHPRS/GoDaddy/my.server.name.key
> userdb {
>   driver = passwd
> }
> verbose_ssl = yes
>
>
> Here's what I've tried so far as 10-auth.conf:
>
> disable_plaintext_auth = no
> auth_use_winbind = yes
> info_log_path = /var/log/dovecot_info
> auth_verbose = yes
> auth_debug_passwords = yes
> auth_verbose_passwords= plain
> auth_winbind_helper_path = /usr/bin/ntlm_auth
>
> auth_mechanisms = ntlm plain login
>
> userdb {
>   driver = passwd
>   args = username_format=%n allow_all_users=yes
>
> }
>
>
> Which gives me a dovecot -n of:
>
> $ dovecot -n
> # 2.2.15: /usr/local/etc/dovecot/dovecot.conf
> # OS: Linux 3.10.17 x86_64 Slackware 14.1
> auth_debug_passwords = yes
> auth_mechanisms = ntlm plain login
> auth_use_winbind = yes
> auth_verbose = yes
> auth_verbose_passwords = plain
> disable_plaintext_auth = no
> info_log_path = /var/log/dovecot_info
> mail_location = maildir:~/Maildir
> protocols = imap
> ssl_cert =
</etc/ssl/certs/OHPRS/GoDaddy/Apache/2015-08-14/57aa6ed6ae98b4c7.crt
> ssl_key = </etc/ssl/certs/OHPRS/GoDaddy/my.server.name.key
> userdb {
>   args = username_format=%n allow_all_users=yes
>   driver = passwd
> }
> verbose_ssl = yes
>
>
> I configured Thunderbird for NTLM authentication, then tried sending a
message, I got the
> following in /var/log/dovecot_info:
>
> Apr 22 01:37:57 imap-login: Debug: SSL: elliptic curve secp384r1 will be
used for ECDH and ECDHE key exchanges
> Apr 22 01:37:57 imap-login: Debug: SSL: elliptic curve secp384r1 will be
used for ECDH and ECDHE key exchanges
> Apr 22 01:37:57 auth: Debug: Loading modules from directory:
/usr/local/lib/dovecot/auth
> Apr 22 01:37:57 imap-login: Info: Disconnected: Auth process broken
(disconnected before auth was ready, waited 0 secs): user=<>,
rip=192.168.0.58, lip=98.102.63.107, session=<xFuyOgwx9wDAqAA6>
>
>
> On Thunderbird I got the error, "Sending of the message failed.  The
Outlgoing server (SMTP)
> my.server.name does not support the selected authentication method.  Please
change the
> 'Autnentication method' in 'Account Settings | Outgoing Server
(SMTP)'."
>
> Clearly, something is configured wrong, but I've no clue what.
>
> Can I get some advice?
>
> THX --Mark

---
Aki Tuomi