Hi,
In case anyone is experiencing the same issue in the future, seems that this probably is a bug. I've upgraded to dovecot 2.2.24 from Jessie backports and it works as documented with no configuration changes.
Hope someone else finds this useful.
Best Regards
Martin
On 2016-11-22 16:39, Martin Wheldon wrote:
Hi mailing list,
I'm currently running dovecot 2.2.13 from Debian Jessie, all is running fine. However I am attempting to merge 2 LDAP authentication sources.
I would like to attempt to authenticate against the first authentication source, if that fails either by password fail or user not found, then attempt the next LDAP server.
I've added the a passdb and userdb entry for the new ldap server. As you can see from the log below the user isn't found in the first LDAP query, but is in the second one. However the authentication fails:
Nov 22 13:59:38 he01-imap-01 dovecot: auth: Debug: client in: AUTH#0111#011PLAIN#011service=imap#011secured#011session=WTLjLuRB9QBRlIlQ#011lip=51.254.222.112#011rip=81.148.137.80#011lport=143#011rport=56821#011resp=AG1hcnRpbi53aGVsZG9uQGdyXWVuaGlsbHMtaXQuY28udWsAQ3JhY2spbk4wdw== (previous base64 data may contain sensitive data) Nov 22 13:59:38 he01-imap-01 dovecot: auth: Debug: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<WTLjLuRB9QBRlIlQ>): bind search: base=dc=greenhills-it,dc=co,dc=uk filter=(&(&(ukFirmGhITAccSrvcs=Email)(ukFirmGhITAccLocked=Email-FALSE))(|(uidNumber=martin.wheldon at greenhills-it.co.uk)(mail=martin.wheldon at greenhills-it.co.uk))) Nov 22 13:59:38 he01-imap-01 dovecot: auth: Error: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<WTLjLuRB9QBRlIlQ>): ldap_search(base=dc=greenhills-it,dc=co,dc=uk filter=(&(&(ukFirmGhITAccSrvcs=Email)(ukFirmGhITAccLocked=Email-FALSE))(|(uidNumber=martin.wheldon at greenhills-it.co.uk)(mail=martin.wheldon at greenhills-it.co.uk)))) failed: No such object Nov 22 13:59:38 he01-imap-01 dovecot: auth: Debug: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<WTLjLuRB9QBRlIlQ>): bind search: base=dc=greenhills-it,dc=co,dc=uk filter=(|(uid=martin.wheldon at greenhills-it.co.uk)(mail=martin.wheldon at greenhills-it.co.uk)) Nov 22 13:59:38 he01-imap-01 dovecot: auth: Debug: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<WTLjLuRB9QBRlIlQ>): result: uid=00000001; uid unused Nov 22 13:59:38 he01-imap-01 dovecot: auth: Debug: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<WTLjLuRB9QBRlIlQ>): username changed martin.wheldon at greenhills-it.co.uk -> 00000001 Nov 22 13:59:38 he01-imap-01 dovecot: auth: Debug: ldap(00000001,81.148.137.80,<WTLjLuRB9QBRlIlQ>): result: uid=00000001 Nov 22 13:59:40 he01-imap-01 dovecot: auth: Debug: client passdb out: FAIL#0111#011user=00000001#011temp#011original_user=martin.wheldon at greenhills-it.co.uk
I know that the password was entered correctly because if I disable the new ldap config and login I get authenticated properly.
Nov 22 14:00:38 he01-imap-01 dovecot: auth: Debug: auth client connected (pid=2626) Nov 22 14:00:39 he01-imap-01 dovecot: auth: Debug: client in: AUTH#0111#011PLAIN#011service=imap#011secured#011session=ipKBMuRBBQBRlIlQ#011lip=51.254.222.112#011rip=81.148.137.80#011lport=143#011rport=38149#011resp=AG1hcnRpbi53aGVsZG9uQGdyXWVuaGlsbHMtaXQuY28udWsAQ3JhY2spbk4wdw== (previous base64 data may contain sensitive data) Nov 22 14:00:39 he01-imap-01 dovecot: auth: Debug: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<ipKBMuRBBQBRlIlQ>): bind search: base=dc=greenhills-it,dc=co,dc=uk filter=(|(uid=martin.wheldon at greenhills-it.co.uk)(mail=martin.wheldon at greenhills-it.co.uk)) Nov 22 14:00:39 he01-imap-01 dovecot: auth: Debug: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<ipKBMuRBBQBRlIlQ>): result: uid=00000001; uid unused Nov 22 14:00:39 he01-imap-01 dovecot: auth: Debug: ldap(martin.wheldon at greenhills-it.co.uk,81.148.137.80,<ipKBMuRBBQBRlIlQ>): username changed martin.wheldon at greenhills-it.co.uk -> 00000001 Nov 22 14:00:39 he01-imap-01 dovecot: auth: Debug: ldap(00000001,81.148.137.80,<ipKBMuRBBQBRlIlQ>): result: uid=00000001 Nov 22 14:00:39 he01-imap-01 dovecot: auth: Debug: client passdb out: OK#0111#011user=00000001#011original_user=martin.wheldon at greenhills-it.co.uk
I've done loads of googling and I believe that this is possible so I must either have misread the documentation or am triggering a bug. Neither of which I seem to be able to confirm.
Any help would be much appreciated.
My broken configuration is below:
# 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 3.16.0-4-amd64 x86_64 Debian 8.6 auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login default_vsz_limit = 512 M lmtp_rcpt_check_quota = yes lmtp_save_to_detail_mailbox = yes mail_location = maildir:~/Maildir mail_plugins = " quota" managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-ldap-new.conf.ext driver = ldap } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap skip = authenticated } plugin { antispam_backend = pipe antispam_pipe_program = /usr/sbin/sendmail antispam_pipe_program_args = -f;%{auth_user};-r;%{auth_user} antispam_pipe_program_notspam_arg = retrain-as-ham@greenhills-it.co.uk antispam_pipe_program_spam_arg = retrain-as-spam@greenhills-it.co.uk antispam_spam = Spam antispam_trash = Trash quota = maildir:User quota quota_rule = *:storage=1G quota_rule2 = Trash:ignore quota_rule3 = Spam:ignore sieve = ~/.dovecot.sieve sieve_before = /var/lib/dovecot/sieve/move-spam.sieve sieve_dir = ~/sieve } protocols = " imap lmtp sieve pop3" service imap-login { process_min_avail = 20 service_count = 1 } service imap { process_min_avail = 20 } service lmtp { inet_listener lmtp { address = he01-imap-01.greenhills-it.co.uk 127.0.0.1 port = 2003 } } service pop3 { process_min_avail = 20 } ssl = required ssl_cert =
# Working LDAP configuration # /etc/dovecot/dovecot-ldap.conf.ext uris = ldap://he01-auth-01.greenhills-it.co.uk dn = uid=dovecot,ou=people,ou=SRV_Accounts,dc=greenhills-it,dc=co,dc=uk dnpass = VerySecret sasl_bind = no auth_bind = yes ldap_version = 3 base = dc=greenhills-it,dc=co,dc=uk scope = subtree user_attrs = homeDirectory=home,uidNumber=uid,gidNumber=gid,gosaMailQuota=quota_rule=*:storage=%$M user_filter = (|(uid=%u)(mail=%u)(gosaMailAlternateAddress=%u)) pass_attrs = uid=user,userPassword=password pass_filter = (|(uid=%u)(mail=%u)) default_pass_scheme = CRYPT
# Non working LDAP configuration # /etc/dovecot/dovecot-ldap-new.conf.ext uris = ldap://dir.greenhills-it.co.uk dn = "cn=dovecot,ou=search accounts,ou=services,dc=greenhills-it,dc=co,dc=uk" dnpass = VerySecret sasl_bind = no tls = yes tls_ca_cert_file = /etc/ssl/certs/GreenhillsCACert.pem tls_require_cert = demand debug_level = -1 auth_bind = yes ldap_version = 3 base = ou=customers,dc=greenhills-it,dc=co,dc=uk scope = subtree user_attrs = homeDirectory=home,uidNumber=uid,gidNumber=gid,ukFirmGhITAccMailQuota=quota_rule=*:storage=%$M user_filter = (&(&(ukFirmGhITAccSrvcs=Email)(ukFirmGhITAccLocked=Email-FALSE))(|(uidNumber=%u)(mail=%u)(ukFirmGhITAccMailAlias=%u))) pass_attrs = uidNumber=user pass_filter = (&(&(ukFirmGhITAccSrvcs=Email)(ukFirmGhITAccLocked=Email-FALSE))(|(uidNumber=%u)(mail=%u))) default_pass_scheme = SSHA
Best Regards