Re: [gentoo-security] postfix and SASL

[Joerg Mertin]

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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>>Delivered-To: <gentoo-security@l.g.o>
>>Date: Wed, 05 Oct 2005 12:36:01 +0100
>>From: Jonathan Wright <mail@×××××××××.uk>
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>>To: gentoo-security@l.g.o
>>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
>
>


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| Joerg Mertin              :  smurphy@××××××.org                (Home)|
| in Forchheim/Germany      :  smurphy@×××××.de                  (Alt1)|
| Stardust's LiNUX System   :                                          |
| Web: http://www.solsys.org                                           |
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