Fwd: Re: [gentoo-security] postfix and SASL

[Joe Strusz]

OK, well i disabled the smtpd_tl_auth_only line.

And now whenever i try to connect via say outlook express on a client 
machine...

I check the box that says, "my outgoing server requires 
authentication", and i do get the password prompt, however whichever 
login/password i try to use it gets rejected, over and over and over again...


any suggestions?

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>Date: Wed, 5 Oct 2005 15:15:22 +0200 (CEST)
>Subject: Re: [gentoo-security] postfix and SASL
>From: "Joerg Mertin" <smurphy@××××××.org>
>To: gentoo-security@l.g.o
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>OK - as this seem to be quite difficutl for many - here my configuration
>of postfix - TLS and SASL parts only:
>
>## TLS
>#  Transport Layer Security
>#
>smtpd_use_tls = yes
>smtpd_tls_auth_only = yes
>smtpd_tls_key_file = /etc/ssl/postfix/stargate.solsys.org.key
>smtpd_tls_cert_file = /etc/ssl/postfix/stargate.solsys.org.crt
>smtpd_tls_CAfile = /etc/ssl/postfix/stargate.solsys.org.pem
>smtpd_tls_loglevel = 3
>smtpd_tls_received_header = yes
>smtpd_tls_session_cache_timeout = 3600s
>tls_random_source = dev:/dev/urandom
>
># SASL SUPPORT FOR CLIENTS
>#
># The following options set parameters needed by Postfix to enable
># Cyrus-SASL support for authentication of mail clients.
>#
>broken_sasl_auth_clients = yes
>smtpd_sasl_auth_enable = yes
>smtpd_sasl_security_options = noanonymous
>smtpd_data_restrictions = reject_unauth_pipelining
>smtpd_sasl_local_domain =
>
>
>This setup works here for 2 Years ...
>Cheers
>
>Joerg
>
>
><quote who="Joe Strusz">
> > Whenever i telnet to port 25, and issue the AUTH PLAIN command i receive
> > this:
> >
> > 538: Encryption required for requested authentication mechanism.
> >
> > What does this mean?
> >
> > I could really use some help on this... its been bugging me for weeks now.
> >
> > Also, I do have smtpd_tls_auth_only = yes line
> >
> >
> > Please help
> >
> > blargh.
> >
> > Your fellow befumbled gentoo user.
> >
> >
> >
> >>X-Original-To: jstrusz@×××××.com
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> >>Date: Wed, 05 Oct 2005 12:36:01 +0100
> >>From: Jonathan Wright <mail@×××××××××.uk>
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> >>Subject: Re: [gentoo-security] postfix and SASL
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> >>
> >>Benjamin A'Lee wrote:
> >>>>Not sure but: why on port 25 and not on 465 ?
> >>>I don't think it actually matters which port; IIRC it just enables
> >>>STARTTLS by default on 465.
> >>
> >>Port 465 is for SSL (i.e. secure communication before any
> >>application data is transferred) and Port 25 accepts TLS (where the
> >>data is secured once both parties accept, however, application data
> >>transfer has occurred).
> >>
> >>Anyway, with telnet you can't talk on port 465 :)
> >>
> >> > I have confirmed postfix is indeed compiled with SASL support.  And i
> >> > have TLS working great.  However when i telnet to port 25 and issue
> >> the
> >> > ehlo command, i do receive the starttls etc... yet no AUTH PLAIN
> >> > lines...
> >>
> >>Depending on the configuration, AUTH PLAIN can either be disabled,
> >>or more likely, it's only send should STARTTLS be issued. I have the
> >>following lines in my main.cf:
> >>
> >>-- cut -----------------------------------------
> >># SMTPD SERVER CONTROLS
> >>smtpd_sasl_auth_enable = yes
> >>smtpd_sasl_security_options = noanonymous, noplaintext
> >>broken_sasl_auth_clients = yes
> >>smtpd_sasl_local_domain =
> >>smtpd_recipient_restrictions = permit_sasl_authenticated,
> >>permit_mynetworks, reject_unauth_destination
> >>
> >>smtpd_use_tls = yes
> >>smtpd_tls_auth_only = yes
> >>smtpd_tls_key_file = /etc/postfix/cacert/kenny.key
> >>smtpd_tls_cert_file = /etc/postfix/cacert/kenny.pem
> >>smtpd_tls_CAfile = /etc/postfix/cacert/cacert.pem
> >>smtpd_tls_loglevel = 1
> >>smtpd_tls_received_header = yes
> >>smtpd_tls_session_cache_timeout = 3600s
> >>tls_random_source = dev:/dev/urandom
> >>-- cut -----------------------------------------
> >>
> >>TLS is enabled, but smtpd_tls_auth_only will only permit
> >>authorization from clients who have issued (and successfully
> >>negotiated) the STARTTLS comment.
> >>
> >>Also, you can define what methods Postfix accepts by modifying the
> >>smtp_sasl_security_options directive.
> >>
> >>HTH,
> >>
> >>--
> >>  Jonathan Wright                           ~ mail at djnauk.co.uk
> >>                                            ~ www.djnauk.co.uk
> >>--
> >>  2.6.12-gentoo-r6-djnauk-b2 AMD Athlon(tm) XP 2100+
> >>  up 5 days,  3:02,  4 users,  load average: 0.72, 0.97, 0.71
> >>--
> >>  "I don't mind straight  people  as  long  as  they  act  gay  in
> >>  public."
> >>
> >>              ~ T-shirt worn by Dennis Rodman of the Chicago Bulls
> >>--
> >>gentoo-security@g.o mailing list
> >
> >
> > Joe Strusz
> >
> > IT Assistant
> > Oxford Publishing, Inc.
> > 307 West Jackson Avenue
> > Oxford, MS 38655-2154
> > 800-247-3881
> > 662-236-5510x40
> > jstrusz@×××××.com
> > http://www.nightclub.com
> >
> >
> > --
> > gentoo-security@g.o mailing list
> >
> >
>
>
>--
>------------------------------------------------------------------------
>| Joerg Mertin              :  smurphy@××××××.org                (Home)|
>| in Forchheim/Germany      :  smurphy@×××××.de                  (Alt1)|
>| Stardust's LiNUX System   :                                          |
>| Web: http://www.solsys.org                                           |
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>gentoo-security@g.o mailing list


Joe Strusz

IT Assistant
Oxford Publishing, Inc.
307 West Jackson Avenue
Oxford, MS 38655-2154
800-247-3881
662-236-5510x40
jstrusz@×××××.com
http://www.nightclub.com


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