[Dovecot] dovecot authentication failing

[Robert Schetterer]

Am 14.05.2011 22:13, schrieb David Mehler:
> Hello,
> I'm running dovecot 2.0.x on a centos 5.6 machine. This is a new
> installation, I haven't even opened the firewall to it yet. I was
> trying to telnet localhost 143 and 110 trying to authenticate a user.
> I'm getting authentication failure in my maillog but no details.
> Here's the one line I get in my maillog:
> 
> May 14 15:33:42 ohio dovecot: pop3-login: Aborted login (auth failed,
> 1 attempts): user=<user at example.com>, method=PLAIN, rip=127.0.0.1,
> lip=127.0.0.1, secured
> 
> Here's a doveconf -n:
> # 2.0.12: /etc/dovecot/dovecot.conf
> # OS: Linux 2.6.38.3-linode32 i686 CentOS release 5.6 (Final) ext3
> auth_default_realm = domain.com
> auth_mechanisms = plain login
> base_dir = /var/run/dovecot/
> disable_plaintext_auth = no
> listen = *
> mail_location = maildir:/var/spool/mail/vhosts/%d/%u
> maildir_very_dirty_syncs = yes
> mbox_write_locks = fcntl
> passdb {
>   args = scheme=CRYPT username_format=%u /etc/dovecot/users
>   driver = passwd-file
> }
> protocols = imap pop3
> service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     group = postfix
>     user = postfix
>   }
> }
> ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
> ssl_key = </etc/pki/dovecot/private/dovecot.pem
> 
> Here's how I constructed my users file:
> #
> # Passwd-file for use with dovecot authentication
> # Used in a virtual setup
> # Username:{scheme}HashedPassword:UID:GID::
> user:{SSHA512}hbLu+pCmhmtyKEwyAs3wv3kvHD/ryr0MoXOAq3VdB7X/g8qIE/xE9BG+eI4jhFk9pTyiCltPCjZxv5/+yK1wll2LNcw=
> :5000:5000::
> 
> My goal is to use this with a postfix virtual mailbox setup, the
> postfix part is already in place. The mailbox base is
> /var/spool/mail/vhosts and under that there's example.com which is the
> domain and under that the various users one just called user for this
> example. The Uid and Gid 5000 is the same one the postfix vmail user
> is running as that's the user who handles the virtual mailbox domains.
> 
> I'm suspecting my issue is in my users file or the definition of it in
> passwd-file{ i've been over the wiki for 2.0.x dovecot, this was
> definitely worth the upgrade by the way, and thus far have not found
> an answer.
> 
> I'd appreciate any help.
> Thanks.
> Dave.

 i am definitive not familar with "file auth"
but you can switch on more verbose debug logging in dovecot , this
should help finding bug reasons
http://wiki2.dovecot.org/Logging

-- 
Best Regards

MfG Robert Schetterer

Germany/Munich/Bavaria