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Old 11-25-2008, 05:36 PM   #1
linuxpyro
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[SOLVED] Postfix and Ldap: Unable to bind to server


I have a Debian Etch box I am trying to use to host multiple virtual domains for Email. I am using Postfix 2.3.8-2+etch1 and OpenLDAP 2.3.30-5+etch2. Right now I am having trouble getting Postfix to talk to ldap. It gives errors about not being able to bind:

Code:
Nov 26 04:33:02 clamato postfix/smtpd[32745]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled
Nov 26 04:33:02 clamato postfix/smtpd[32745]: connect from localhost[127.0.0.1]
Nov 26 04:33:14 clamato postfix/trivial-rewrite[32747]: warning: dict_ldap_connect: Unable to bind to server ldap://localhost:389 as : 2 (Protocol error)
Nov 26 04:33:14 clamato last message repeated 2 times
Nov 26 04:33:14 clamato postfix/trivial-rewrite[32747]: fatal: ldap:transport(0,lock|fold_fix): table lookup problem
Nov 26 04:33:15 clamato postfix/smtpd[32745]: warning: premature end-of-input on private/rewrite socket while reading input attribute name
Nov 26 04:33:15 clamato postfix/master[32737]: warning: process /usr/lib/postfix/trivial-rewrite pid 32747 exit status 1
Nov 26 04:33:16 clamato postfix/trivial-rewrite[32748]: warning: dict_ldap_connect: Unable to bind to server ldap://localhost:389 as : 2 (Protocol error)
Nov 26 04:33:16 clamato last message repeated 2 times
Nov 26 04:33:16 clamato postfix/trivial-rewrite[32748]: fatal: ldap:transport(0,lock|fold_fix): table lookup problem
Nov 26 04:33:17 clamato postfix/smtpd[32745]: warning: premature end-of-input on private/rewrite socket while reading input attribute name
Nov 26 04:33:17 clamato postfix/smtpd[32745]: warning: problem talking to service rewrite: Success
Nov 26 04:33:17 clamato postfix/master[32737]: warning: process /usr/lib/postfix/trivial-rewrite pid 32748 exit status 1
Nov 26 04:33:17 clamato postfix/master[32737]: warning: /usr/lib/postfix/trivial-rewrite: bad command startup -- throttling
The above came in /var/log/maillog after telnetting into port 25 of my mail server, and then typing MAIL FROM:me@mydomain and hitting enter; nothing else was returned at the prompt.

You can find my main.cf here: http://bokonon.rit.edu/main.cf. I searched around and found someone who mentioned that removing the ldap_ prfix that was present on some of the variables solved the problem, though it hasn't in my case.

Has anyone seen this sort of thing before?

Last edited by linuxpyro; 12-09-2008 at 11:07 PM. Reason: Solved
 
Old 11-25-2008, 11:54 PM   #2
blacky_5251
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Look in the /etc/ldap.conf file and you'll see something like this:-
Code:
# The distinguished name to bind to the server with
# if the effective user ID is root. Password is
# stored in /etc/ldap.secret (mode 600)
rootbinddn cn=manager,dc=example,dc=com
The file /etc/ldap.secret needs to be owned and readable by root only - e.g.
Code:
2.6.18-92.1.13.el5xen[root@www etc]# ls -l ldap.secret
-rw------- 1 root root 8 Jun 13 11:09 ldap.secret
2.6.18-92.1.13.el5xen[root@www etc]#
The file itself needs to hold the password for the rootbinddn entry in /etc/ldap.conf (i.e. cn=manager,dc=example,dc=com)

Hope that helps!
 
Old 11-26-2008, 01:58 PM   #3
linuxpyro
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I already have the admin dn defined in /etc/openldap/slapd.conf, and a password set in the directory. I can log in and browse my directory using phpldapadmin just fine, using the username and password in my main.cf, so I'm not sure that's the problem.
 
Old 11-26-2008, 04:00 PM   #4
blacky_5251
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Can you please post the (censored) output from:-
Code:
postconf -n
I can post mine if you want. I'm using Postfix 2:2.3.3-2.1.el5_2 with OpenLDAP 2.3.27-8.el5_2.4 and Dovecot 1.0.7-2.el5 on a CentOS 5.2 box. I must admit that I'm not using virtual email domains, so there could be some complexity there that I will not be aware of.
 
Old 11-27-2008, 02:55 PM   #5
linuxpyro
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Quote:
Originally Posted by blacky_5251 View Post
Can you please post the (censored) output from:-
Code:
postconf -n
I can post mine if you want.
Here is my postconf -n:

Code:
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
home_mailbox = Maildir/
local_recipient_maps = proxy:unix:passwd.byname, $alias_maps, $virtual_mailbox_maps
mydestination = $transport_maps, localhost, $myhostname, localhost.$mydomain, $mydomain
mydomain = mydomain.com
myhostname = clamato.mydomain.com
mynetworks = 127.0.0.0/8, 192.168.0.0/16
mynetworks_style = subnet
myorigin = $mydomain
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
transport_maps = hash:/etc/postfix/transport, ldap:transport
unknown_local_recipient_reject_code = 550
virtual_alias_maps = hash:/etc/postfix/virtual, ldap:virtualforward, ldap:aliases, ldap:accountsmap
virtual_gid_maps = static:1002
virtual_mailbox_base = /var/mail/virtual/domains
virtual_mailbox_maps = ldap:accounts
virtual_minimum_uid = 1002
virtual_uid_maps = static:1002
(Again, note that I changed my actual domain to mydomain.)

If you wouldn't mind, I guess I would like to see your's.
 
Old 11-27-2008, 03:06 PM   #6
blacky_5251
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I feel like a schoolboy again. I'll show you mine if you show me yours....
Code:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
home_mailbox = Maildir/
html_directory = no
local_recipient_maps =
mail_owner = postfix
mailbox_command = /usr/bin/procmail -a "$EXTENSION" DEFAULT=$HOME/Maildir/ MAILDIR=$HOME/Maildir
mailbox_size_limit = 51200000000
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 102400000
mydestination = <snip>mydomain</snip>, localhost.localdomain
mynetworks = 192.168.1.0/24, 192.168.2.0/24, 192.168.3.0/24, 192.168.5.0/24, 127.0.0.0/8
myorigin = <snip>mydomain</snip>
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
recipient_delimiter = +
relayhost = mail.internode.on.net
sample_directory = /usr/share/doc/postfix-2.3.3/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_client_restrictions = permit_mynetworks,    permit_sasl_authenticated,    permit
smtpd_delay_reject = yes
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,    reject_non_fqdn_helo_hostname,    reject_invalid_helo_hostname,    permit
smtpd_recipient_restrictions = reject_unauth_pipelining,    reject_non_fqdn_recipient,    reject_unknown_recipient_domain,    permit_mynetworks,    permit_sasl_authenticated,    reject_unauth_destination,    reject_rbl_client dnsbl.spamhaus.org,    reject_rbl_client bl.spamcop.net,    reject_rbl_client list.dsbl.org,    reject_rbl_client cbl.abuseat.org,    reject_rbl_client dnsbl.njabl.org,    check_policy_service inet:127.0.0.1:10023,    permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous noplaintext
smtpd_sender_restrictions = permit_mynetworks,    reject_non_fqdn_sender,    reject_unknown_sender_domain,    permit
smtpd_tls_cert_file = /etc/pki/tls/certs/dovecot.pem
smtpd_use_tls = yes
unknown_local_recipient_reject_code = 550
For completeness, here's my /etc/postfix/master.cf file:-
Code:
# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# ==========================================================================
smtp      inet  n       -       n       -       -       smtpd
# -----------------------------------------------------------------------------------
#submission inet n       -       n       -       -       smtpd
#  -o smtpd_enforce_tls=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject

# For outlook express (Ian 12/05/08)
smtps     inet  n       -       n       -       -       smtpd
  -o smtpd_tls_wrappermode=yes
  -o smtpd_sasl_security_options=noanonymous
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#628      inet  n       -       n       -       -       qmqpd
pickup    fifo  n       -       n       60      1       pickup
cleanup   unix  n       -       n       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
#qmgr     fifo  n       -       n       300     1       oqmgr
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
rewrite   unix  -       -       n       -       -       trivial-rewrite
bounce    unix  -       -       n       -       0       bounce
defer     unix  -       -       n       -       0       bounce
trace     unix  -       -       n       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       n       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
smtp      unix  -       -       n       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       n       -       -       smtp
        -o fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       n       -       -       showq
error     unix  -       -       n       -       -       error
discard   unix  -       -       n       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
scache    unix  -       -       n       -       1       scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent.  See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
#
# The Cyrus deliver program has changed incompatibly, multiple times.
#
old-cyrus unix  -       n       n       -       -       pipe
  flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m ${extension} ${user}
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
cyrus     unix  -       n       n       -       -       pipe
  user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m ${extension} ${user}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp      unix  -       n       n       -       -       pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
 
Old 12-06-2008, 08:30 PM   #7
linuxpyro
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Alright guys, sorry for leaving this for a while but it's been driving me crazy, and I had to get my head out of it for a bit. Blacky_5251, thanks for your info, though I think this is LDAP-specific.

First I added the line allow bind_v2 to my slapd.conf, which got rid of the protocol error. Next I went through the Postfix documentation for a while, but this is all the progress I've made. I created a file called ldap-users.cf, with the following:

Code:
server_host = localhost
search_base = dc=mydomain,dc=com
version = 3
query_filter = (&(objectclass=person)(mail=%s))
result_attribute = uid
result_format = %s/Maildir/
Next, I try to search for a virtual domain entry with the following:

Code:
postmap -q me@myvirtualdomain.com ldap:ldap-users.cf
I now got the following as a result:

Code:
postmap: warning: dict_ldap_lookup: ldap-users.cf: Search base '' not found: 32: No such object
I'm not sure about this one, as that should be my correct search base.
 
Old 12-09-2008, 11:07 PM   #8
linuxpyro
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Alright, I think I made some progress. When working with the postmap command, it wants to see a full path to the filename, not just a relative path. So this works:

Code:
postmap -q me@myvirtualdomain.com ldap:/etc/postfix/ldap-users.cf
I think I can figure the rest out; thanks to those who replied.
 
  


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