Gentoo Archives: gentoo-security

From: Joe Strusz <jstrusz@×××××.com>
To: gentoo-security@l.g.o
Subject: Re: [gentoo-security] postfix and SASL
Date: Wed, 05 Oct 2005 13:14:26
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


Your fellow befumbled gentoo user.

>X-Original-To: jstrusz@×××××.com >Delivered-To: jstrusz@×××××.com >Delivered-To: <gentoo-security@l.g.o> >Date: Wed, 05 Oct 2005 12:36:01 +0100 >From: Jonathan Wright <mail@×××××××××.uk> >User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050822) >X-Accept-Language: en-us, en >List-Post: <mailto:gentoo-security@l.g.o> >List-Help: <mailto:gentoo-security+help@g.o> >List-Unsubscribe: <mailto:gentoo-security+unsubscribe@g.o> >List-Subscribe: <mailto:gentoo-security+subscribe@g.o> >List-Id: Gentoo Linux mail <> >X-BeenThere: gentoo-security@g.o >Reply-To: gentoo-security@l.g.o >To: gentoo-security@l.g.o >Subject: Re: [gentoo-security] postfix and SASL >X-Virus-Scanned: This message was scanned for viruses by ClamAV. >X-Spam-Status: No, hits=-2.599 tagged_above=-100 required=6.5 tests=BAYES_00 >X-Spam-Level: > >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 > >-- 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 > ~ >-- > 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 -- gentoo-security@g.o mailing list


Subject Author
Re: [gentoo-security] postfix and SASL Joerg Mertin <smurphy@××××××.org>
Re: [gentoo-security] postfix and SASL David vasil <vasil@××××××.edu>