[Dovecot] Proxy setup & upgrade from 1.0.3 to 1.1.7

[Adrian Wojcicki | Unternehmensberatung Wojcicki]

Hi guys!

I hope somebody can help me with my problem:
We have a server running dovecot and proxying IMAPS connections to our 
internal network. This worked so far very good until we upgraded the 
server to a new SUSE Linux version and with it dovecot from version 
1.0.3 to 1.1.7.

My guess is that something changed in the way dovecot reads the user 
file as the configuration stayed the same:


dovecot.conf:

base_dir = /var/run/dovecot/
protocols = imaps
disable_plaintext_auth = yes
ssl_cert_file = /<pathtocertificate>
ssl_key_file = /<pathtocertificate>
ssl_disable = no
ssl_listen = 80.149.64.98:993
log_path = /var/log/dovecot.log
login_dir = /var/run/dovecot/login
login_process_per_connection = yes
login_processes_count = 3
login_greeting = main.xbdx.de IMAP What can we do for you?
imap_client_workarounds = tb-extra-mailbox-sep
mail_debug = no
auth_debug = yes
auth_cache_size = 4096
auth_cache_ttl = 7200
auth_worker_max_count = 30
auth default {
  userdb static {
    args = uid=5000 gid=5000
  }
  passdb {
    driver = passwd-file
    args = /etc/dovecot/dovecot.passdb
  }
  socket listen {
    client {
      path = /var/spool/postfix/private/auth
      mode = 0660
      user = postfix
      group = postfix
    }
  }
  mechanisms = plain login
  user = root
  count = 1
}


dovecot.passdb:

testuser1:::::::host=<internalip> port=143 nodelay=y nologin=y proxy=y
testuser2:::::::host=<internalip> port=143 nodelay=y nologin=y proxy=y


dovecot.log:

dovecot: Oct 06 10:37:26 Info: Dovecot v1.1.7 starting up
dovecot: Oct 06 10:37:26 Info: auth(default): passwd-file 
/etc/dovecot/dovecot.passdb: Read 2 users
dovecot: Oct 06 10:37:27 Info: auth(default): new auth connection: pid=8135
dovecot: Oct 06 10:37:27 Info: auth(default): new auth connection: pid=8136
dovecot: Oct 06 10:37:27 Info: auth(default): new auth connection: pid=8137
dovecot: Oct 06 10:37:39 Info: auth(default): new auth connection: pid=8139
dovecot: Oct 06 10:37:39 Info: auth(default): client in: AUTH   1 
PLAIN   service=imap    secured lip=80.149.64.98        rip=217.91.33.32 
       lport=993       rport=61752     resp=<hidden>
dovecot: Oct 06 10:37:39 Info: auth(default): 
cache(adrian.wojcicki,217.91.33.32): miss
dovecot: Oct 06 10:37:39 Info: auth(default): 
passwd-file(testuser1,217.91.33.32): lookup: user=testuser1 
file=/etc/dovecot/dovecot.passdb
dovecot: Oct 06 10:37:39 Info: auth(default): 
passwd-file(testuser1,217.91.33.32): Password mismatch
dovecot: Oct 06 10:37:41 Info: auth(default): client out: FAIL  1 
user=testuser1    host=<internalip>      port=143        nologin proxy 
 pass=<hidden>
dovecot: Oct 06 10:37:41 Info: imap-login: Aborted login (auth failed, 1 
attempts): user=<testuser1>, method=PLAIN, rip=217.91.33.32, 
lip=80.149.64.98, TLS

Thanks!
Adrian