From iRedMail

(Difference between revisions)

Revision as of 00:34, 15 July 2011

Summary

NOTE: We just tested this tutorial on Windows 2000 and 2003 server, if you tested it on other versions and works well, please let us know. Contact us.

With AD + iRedMail integration, you can get below features:

User authentication against Windows Active Directory. You can now manage mail domains, users, mail lists with AD.
Mail list support with group in AD.
Global LDAP Address Book with AD in Roundcube Webmail.
Account status support. Disable user in Active Directory will cause this account disabled in iRedMail.

Since AD uses different LDAP schema, you will lose some iRedMail special features. e.g.

Per-user, per-domain bcc control with LDAP. You should use hash file instead.
TO BE CONTINUED.

Requirements

To integrate Microsoft Active Directory with iRedMail, you should have:

A working Microsoft Windows (2000/2003) server, with Active Directory installed and working, listen on port 389 (ldap://) or 636 (ldaps://).
A working Linux/BSD with iRedMail+OpenLDAP installed.
iRedMail server can access Windows AD server via port 389 or 636.

Install iRedMail

Please install iRedMail on Linux/BSD with OpenLDAP backend first, we will achieve this AD integration by simply modify some configure files.

Here is iRedMail installaion guides.

Integrate Microsoft Active Directory

We assume:

Hostname of your AD server is 'ad.example.com', listen on port 389.
- We will use this hostname below, you can replace it by IP address.
- If you want to force LDAP connection with LDAPS, use port 636 instead.
Base dn in AD is "dc=example,dc=com", email addresses of all users are ends with '@example.com' (Your mail domain is 'example.com').
All user accounts and mail list accounts are placed under dn "cn=Users,dc=example,dc=com". Note: dn is case-insensitive.
For ldap connection, protocol version '3' is recommended. All pupular LDAP servers support LDAP protocol version 3.
Store all mails on Linux/BSD servers, not on AD server.
- Storage directory is /var/vmail/vmail1, same as default in iRedMail.
- Mailbox of user "support@example.com" will be /var/vmail/vmail1/example.com/support/Maildir/, maildir format.

Create user account in AD, used for LDAP query

With iRedMail + OpenLDAP, we have a low-privileged account "cn=vmail,dc=xxx,dc=xxx" for query only. So we suggest you create a same account vmail in AD, with complex password.

NOTE:

Dovecot will treat characters as comment after a inline '#', so please just don't use '#' in password

Test AD query with ldap command line tool

Terminal:

# ldapsearch -x -h ad.example.com -D 'vmail' -W -b 'cn=users,dc=example,dc=com'
Enter password: password_of_vmail

Enable LDAP query with AD in Postfix

Modify postfix main.cf, let it query AD instead of OpenLDAP.

Note: we will create there AD query files later:

/etc/postfix/ad_virtual_mailbox_maps.cf
/etc/postfix/ad_virtual_group_maps.cf
/etc/postfix/ad_sender_login_maps.cf

File: main.cf

#
# Unused iRedMail special settings.
# Set them to empty value OR comment these lines.
#
virtual_mailbox_domains =
virtual_alias_maps =
sender_bcc_maps =
recipient_bcc_maps =

relay_domains =
relay_recipient_maps =

#
# Add your mail domain in "smtpd_sasl_local_domain" and "virtual_mailbox_domains".
#
smtpd_sasl_local_domain = example.com
virtual_mailbox_domains = example.com

#
# Change some settings.
#
# Transport maps.
transport_maps = hash:/etc/postfix/transport

#
# AD query.
#
# Note: We will create these 3 files later.
#
# Used to verify sender.
smtpd_sender_login_maps = proxy:ldap:/etc/postfix/ad_sender_login_maps.cf

# Used to query mail users.
virtual_mailbox_maps = proxy:ldap:/etc/postfix/ad_virtual_mailbox_maps.cf

# Used to query mail lists/groups.
virtual_alias_maps = proxy:ldap:/etc/postfix/ad_virtual_group_maps.cf

Create/Edit file: /etc/postfix/transport:

File: /etc/postfix/transport

example.com dovecot

Run 'postmap' so that postfix can read it:

Terminal:

# postmap hash:/etc/postfix/transport

Create/Edit file: /etc/postfix/ad_sender_login_maps.cf:

File: ad_sender_login_maps.cf

server_host     = ad.example.com
server_port     = 389
version         = 3
bind            = yes
start_tls       = no
bind_dn         = vmail
bind_pw         = password_of_vmail
search_base     = cn=users,dc=example,dc=com
scope           = sub
query_filter    = (&(userPrincipalName=%s)(objectClass=person)(!(userAccountControl:1.2.840.113556.1.4.803:=2)))
result_attribute= userPrincipalName
debuglevel      = 0

Create/Edit file: ad_virtual_mailbox_maps.cf

File: ad_virtual_mailbox_maps.cf

server_host     = ad.example.com
server_port     = 389
version         = 3
bind            = yes
start_tls       = no
bind_dn         = vmail
bind_pw         = passwd_of_vmail
search_base     = cn=users,dc=example,dc=com
scope           = sub
query_filter    = (&(objectclass=person)(userPrincipalName=%s))
result_attribute= userPrincipalName
result_format   = %d/%u/Maildir/
debuglevel      = 0

Create/Edit file: /etc/postfix/ad_virtual_group_maps.cf

File: ad_virtual_group_maps.cf

server_host     = ad.example.com
server_port     = 389
version         = 3
bind            = yes
start_tls       = no
bind_dn         = vmail
bind_pw         = password_of_vmail
search_base     = cn=users,dc=example,dc=com
scope           = sub
query_filter    = (&(objectClass=group)(mail=%s))
special_result_attribute = member
leaf_result_attribute = mail
result_attribute= userPrincipalName
debuglevel      = 0

Note: If your user have email address in both "mail" and "userPrincipalName", you will get duplicate result. Comment 'leaf_result_attribute' can fix it.

Also, we need to remove iRedAPD related settings in Postfix:

Open /etc/postfix/main.cf
Remove this setting: check_policy_service inet:127.0.0.1:7777.

Verify LDAP query with AD in Postfix

We can use command line tool postmap to verify AD query in postfix.

Query mail user:

Terminal:

# postmap -q user@example.com ldap:/etc/postfix/ad_virtual_mailbox_maps.cf
example.com/user/Maildir/

DEBUG*: If you got blank link instead of output like above example, it means LDAP query doesn't get expected result.

Try to set "debuglevel = 1" in file "ad_sender_login_maps.cf", then query again, it now will print more debug message, If you're not familiar with this kind of output message, please create a new forum topic and paste them in your post.

Verify sender login check:

Terminal:

# postmap -q user@example.com ldap:/etc/postfix/ad_sender_login_maps.cf
user@example.com

Verify mail list/group. Steps:
- Create a group in AD, e.g. testgroup@example.com.
- Assign at least one member to this group.
- Execute below command on iRedMail server to verify it can get members.

Terminal:

# postmap -q testgroup@example.com ldap:/etc/postfix/ad_virtual_group_maps.cf
member01@example.com
member02@example.com

Enable LDAP query with AD in Dovecot

We need to modify /etc/dovecot-ldap.conf (RHEL/CentOS) or /etc/dovecot/dovecot-ldap.conf (Debian/Ubuntu), let dovecot query AD instead of local OpenLDAP server.

File: dovecot-ldap.conf

hosts           = ad.example.com:389
ldap_version    = 3
auth_bind       = yes
dn              = vmail
dnpass          = passwd_of_vmail
base            = cn=users,dc=example,dc=com
scope           = subtree
deref           = never
user_filter     = (&(userPrincipalName=%u)(objectClass=person)(!(userAccountControl:1.2.840.113556.1.4.803:=2)))
pass_filter     = (&(userPrincipalName=%u)(objectClass=person)(!(userAccountControl:1.2.840.113556.1.4.803:=2)))
pass_attrs      = userPassword=password
default_pass_scheme = CRYPT
user_attrs      = =home=/var/vmail/vmail1/%Ld/%Ln/Maildir/,=mail=maildir:/var/vmail/vmail1/%Ld/%Ln/Maildir/

Now restart dovecot service to make it work immediately.

Note: we don't have per-user quota limit here, you can set a hard-coded quota for all users in /etc/dovecot.conf (RHEL/CentOS) or /etc/dovecot/dovecot.conf (Debian/Ubuntu). Example:

File: dovecot.conf

plugin {
    # --- SKIP OTHER SETTINGS HERE ---
    # Format: integer + M/G/T.
    # M -> MB, G -> GB, T -> TB.
    quota_rule = *:storage=1G
}

Verify LDAP query with AD in Dovecot

We can use command telnet to verify AD query in Dovecot.

Note: Please do restart dovecot before testing.

Terminal:

# telnet localhost 143                         # <- Type this
* OK [...] Dovecot ready.

. login user@example.com password_of_user        # <- Type this
. OK [...] Logged in
                                        # <- Quit telnet with "Ctrl+]", then type 'quit'.

Note: You just type . login user@example.com password (Do NOT miss the dot) in above testing, if it returns Logged in, then dovecot + AD works as expected.

Enable Global LDAP Address Book wih AD in Roundcube webmail

Edit roundcube config file: /var/www/roundcubemail/config/main.inc.php (RHEL/CentOS) or /usr/share/apache2/roundcubemail/config/main.inc.php (Debian/Ubuntu).

You can remove exist LDAP address book which stored in OpenLDAP, and add a new one with AD.

File: main.inc.php


#
# "sql" is personal address book stored in roundcube database.
# "example.com" is new LDAP address book with AD, we will create it below.
#
$rcmail_config['autocomplete_addressbooks'] = array("sql", "example.com");

#
# Global LDAP Address Book with AD.
#
$rcmail_config['ldap_public']["example.com"] = array(
    'name'          => 'Global Address Book',
    'hosts'         => array("ad.example.com"),     // <- Set AD hostname or IP address here.
    'port'          => 389,
    'use_tls'       => false,                 // <- Set to true if you want to use LDAPS. Change port to 636 on above line too.

    // ---- Used to search accounts only in the same domain. ----
    'user_specific' => false,
    'base_dn'       => "cn=users,dc=example,dc=com",   // <- Set base dn in AD
    'bind_dn'       => "vmail",                     # <- bind dn
    'bind_pass'     => "password_of_vmail",                    // <- bind password
    'writable'      => false,                       # <- Do not allow mail user write data back to AD.
    'ldap_version'  => "3",

    // ---- Search ----
    //'search_fields' => array('displayname', 'userprincipalname', 'sn', 'givenname',),  // <- fields to search in
    'search_fields' => array('mail', 'cn', 'sAMAccountName', 'displayname', 'sn', 'givenName'),
    //'name_field'    => 'displayname',
    'name_field'    => 'cn',
    //'email_field'   => 'userprincipalname',
    'email_field'   => 'mail',
    'surname_field' => 'sn',
    //'firstname_field' => 'givenname',
    'firstname_field' => 'givenName',
    //'sort'          => 'displayname',
    'sort'          => 'cn',
    'scope'         => 'sub',
    //'filter'        => "(&(objectclass=person)(!(userAccountControl:1.2.840.113556.1.4.803:=2)))",
    'filter'        => "(mail=*@*)",
    'fuzzy_search'  => true
);

Integration/Active.Directory.iRedMail

From iRedMail

Revision as of 00:34, 15 July 2011

Contents

Summary

Requirements

Install iRedMail

Integrate Microsoft Active Directory

Create user account in AD, used for LDAP query

Test AD query with ldap command line tool

Enable LDAP query with AD in Postfix

Verify LDAP query with AD in Postfix

Enable LDAP query with AD in Dovecot

Verify LDAP query with AD in Dovecot

Enable Global LDAP Address Book wih AD in Roundcube webmail

Appendix

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