external/LDAP_group/ext_ldap_group_acl.8

.if !'po4a'hide' .TH ext_ldap_group_acl 8 "30 January 2005"
.
.SH NAME
ext_ldap_group_acl \- Squid LDAP external acl group helper
.PP
Version 2.18
.
.SH SYNOPSIS
.if !'po4a'hide' .B ext_ldap_group_acl
.if !'po4a'hide' .B \-b
base\-DN
.if !'po4a'hide' .B \-f
filter
.if !'po4a'hide' .B "["
options
.if !'po4a'hide' .B "] ["
server
.if !'po4a'hide' .B "[ ':' "
port
.if !'po4a'hide' .B "] |"
URI
.if !'po4a'hide' .B "] ..."
.
.SH DESCRIPTION
.B ext_ldap_group_acl
allows Squid to connect to a LDAP directory to authorize users via LDAP groups.
LDAP options are specified as parameters on the command line,
while the username(s) and group(s) to be checked against the
LDAP directory are specified on subsequent lines of input to the
helper, one username/group pair per line separated by a space.
.PP
As expected by the
.B external_acl_type
construct of Squid, after
specifying a username and group followed by a new line, this
helper will produce either
.B OK
or
.B ERR
on the following line
to show if the user is a member of the specified group.
.PP
The program operates by searching with a search filter based
on the users user name and requested group, and if a match
is found it is determined that the user belongs to the group.
.
.SH OPTIONS
.if !'po4a'hide' .TP 12
.if !'po4a'hide' .BI "\-a " never|always|search|find
When to dereference aliases. Defaults to 'never'
.IP
.BI never
dereference aliases (default),
.BI always
dereference aliases, only during a
.BR search
or only to
.B find
the base object
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-b " "basedn "
.B REQUIRED.
Specifies the base DN under which the groups are located.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-B " "basedn "
Specifies the base DN under which the users are located (if different)
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-c " connect_timeout"
Specify timeout used when connecting to LDAP servers (requires
Netscape LDAP API libraries)
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-d
Debug mode where each step taken will get reported in detail.
Useful for understanding what goes wrong if the result is
not what was expected.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-D " "binddn " "\-w " password
The DN and password to bind as while performing searches. Required
if the LDAP directory does not allow anonymous searches.
.IP
As the password needs to be printed in plain text in your Squid configuration
and will be sent on the command line to the helper it is strongly recommended
to use a account with minimal associated privileges.  This to limit the damage
in case someone could get hold of a copy of your Squid configuration file or
extracts the password used from a process listing.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-D " "binddn " "\-W " "secretfile "
The DN and the name of a file containing the password
to bind as while performing searches.
.IP
Less insecure version of the former parameter pair with two advantages:
The password does not occur in the process listing,
and the password is not being compromised if someone gets the squid
configuration file without getting the secretfile.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-E " certpath
Enable LDAP over SSL (requires Netscape LDAP API libraries)
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-f " filter
LDAP search filter used to search the LDAP directory for any
matching group memberships.
.BR
In the filter
.B %u
will be replaced by the user name (or DN if
the
.B \-F
or
.B \-u
options are used) and
.B %g
by the requested group name.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-F " filter
LDAP search filter used to search the LDAP directory for any
matching users.
.BR
In the filter
.B %s
will be replaced by the user name. If
.B %
is to be included literally in the filter then use
.B %%
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .B "\-g"
Specifies that the first query argument sent to the helper by Squid is
a extension to the basedn and will be temporarily added in front of the
global basedn for this query.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-h " ldapserver"
Specify the LDAP server to connect to
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-H " ldapuri"
Specify the LDAP server to connect to by a LDAP URI (requires OpenLDAP libraries)
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-K
Strip Kerberos Realm component from user names (@ separated)
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-p " ldapport"
Specify an alternate TCP port where the LDAP server is listening if
other than the default LDAP port 389.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-P
Use a persistent LDAP connection. Normally the LDAP connection
is only open while verifying a users group membership to preserve
resources at the LDAP server. This option causes the LDAP connection to
be kept open, allowing it to be reused for further user
validations. Recommended for larger installations.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-R
Do not follow referrals
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "-s " base|one|sub
search scope. Defaults to
.B sub
.IP
.B base
object only,
.IP
.B one
level below the base object or
.IP
.BR sub tree
below the base object
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-S
Strip NT domain name component from user names (/ or \\ separated)
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-t " search_timeout"
Specify time limit on LDAP search operations
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI "\-u " attr
LDAP attribute used to construct the user DN from the user name and
base dn without needing to search for the user.
A maximum of 16 occurrences of
.B %s
are supported.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-v " 2|3"
LDAP protocol version. Defaults to
.B 3
if not specified.
.
.if !'po4a'hide' .TP
.if !'po4a'hide' .BI \-Z
Use TLS encryption
.
.SH CONFIGURATION
This helper is intended to be used as an
.B external_acl_type
helper in
.B squid.conf .
.
.if !'po4a'hide' .RS
.if !'po4a'hide' .B external_acl_type ldap_group %LOGIN /path/to/ext_ldap_group_acl ...
.if !'po4a'hide' .br
.if !'po4a'hide' .B acl group1 external ldap_group Group1
.if !'po4a'hide' .br
.if !'po4a'hide' .B acl group2 external ldap_group Group2
.if !'po4a'hide' .RE
.
.PP
.B NOTE:
When constructing search filters it is recommended to first test the filter using
.B ldapsearch
to verify that the filter matches what you expect before you attempt to use
.B ext_ldap_group_acl
.
.SH AUTHOR
This program was written by
.if !'po4a'hide' .I Flavio Pescuma <flavio@marasystems.com>
.if !'po4a'hide' .I Henrik Nordstrom <hno@squid-cache.org>
.PP
Based on prior work in
.B squid_ldap_auth
by
.if !'po4a'hide' .I Glen Newton <glen.newton@nrc.ca>
.PP
This manual was written by
.if !'po4a'hide' .I Henrik Nordstrom <hno@marasystems.com>
.
.SH COPYRIGHT
.PP
 * Copyright (C) 1996-2021 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
.PP
This program and documentation is copyright to the authors named above.
.PP
Distributed under the GNU General Public License (GNU GPL) version 2 or later (GPLv2+).
.
.SH QUESTIONS
Questions on the usage of this program can be sent to the
.I Squid Users mailing list
.if !'po4a'hide' <squid-users@lists.squid-cache.org>
.PP
Or contact your favorite LDAP list/friend if the question is more related to
LDAP than Squid.
.
.SH REPORTING BUGS
Bug reports need to be made in English.
See http://wiki.squid-cache.org/SquidFaq/BugReporting for details of what you need to include with your bug report.
.PP
Report bugs or bug fixes using http://bugs.squid-cache.org/
.PP
Report serious security bugs to
.I Squid Bugs <squid-bugs@lists.squid-cache.org>
.PP
Report ideas for new improvements to the
.I Squid Developers mailing list
.if !'po4a'hide' <squid-dev@lists.squid-cache.org>
.
.SH SEE ALSO
.if !'po4a'hide' .BR squid "(8), "
.if !'po4a'hide' .BR basic_ldap_auth "(8), "
.if !'po4a'hide' .BR ldapsearch "(1), "
.if !'po4a'hide' .BR GPL "(7), "
.br
Your favorite LDAP documentation
.br
.BR RFC2254 " - The String Representation of LDAP Search Filters,"
.br
The Squid FAQ wiki
.if !'po4a'hide' http://wiki.squid-cache.org/SquidFaq
.br
The Squid Configuration Manual
.if !'po4a'hide' http://www.squid-cache.org/Doc/config/