NAME

ext_kerberos_sid_group_acl - external ACL helper for Squid to verify AD Domain group membership using sid.

SYNOPSIS

ext_kerberos_sid_group_acl [-d] [-h] -p Principal Name -D Domain Controller -b Base DN -G Group1:Group2

DESCRIPTION

ext_kerberos_sid_group_acl is an installed executable script. It uses ldapsearch from Openldap to lookup the name of a AD group sid.

This helper must be used in with the negotiate_kerberos_auth helper in a Microsoft AD or Samba environment.

It reads from the standard input the domain username and a list of group sids and tries to match the group SIDs to the AD group sids.

OPTIONS

-d: Write debug info to stderr.
-h: Print the help.
-p principal name: Principal name in squid keytab to use for ldap authentication to AD
-D domain controller: Domain controller to contact to lookup group SID
-b base DN: Base DN for ldap search
-G AD group name: AD group name to be used for SID lookup. List separated by a colon (:)

CONFIGURATION

auth_param negotiate program /path/to/negotiate_wrapper_auth -d \
     --ntlm /path/to/ntlm_auth --helper-protocol=squid-2.5-ntlmssp --domain example.com \
     --kerberos /path/to/negotiate_kerberos_auth -d -s GSS_C_NO_NAME -k /path/to/squid.keytab -t none
external_acl_type sid_check %LOGIN %note{group} /path/to/kerberos_sid_group_acl -p principal -D dc1.example.com -b "DC=example,DC=com" -G Group1:Group2
acl squid_allow external sid_check
acl allowed_group external sid_check
http_access allow allowed_group

If the local perl interpreter is in a unusual location it may need to be added:

external_acl_type sid_check %LOGIN %note{group} /path/to/perl /path/to/kerberos_sid_group_acl -p principal -D dc1.example.com -b "DC=example,DC=com" -G Group1:Group2

AUTHOR

This program was written by Markus Moeller <markus_moeller@compuserve.com>

This manual was written by Markus Moeller <markus_moeller@compuserve.com>

COPYRIGHT

* Copyright (C) 1996-2023 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.
This program is put in the public domain by Markus Moeller
<markus_moeller@compuserve.com>. It is distributed in the hope that it will
be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

QUESTIONS

Questions on the usage of this program can be sent to the Squid Users mailing list <squid-users@lists.squid-cache.org>

REPORTING BUGS

Bug reports need to be made in English. See https://wiki.squid-cache.org/SquidFaq/BugReporting for details of what you need to include with your bug report.

Report bugs or bug fixes using https://bugs.squid-cache.org/

Report serious security bugs to Squid Bugs <squid-bugs@lists.squid-cache.org>

Report ideas for new improvements to the Squid Developers mailing list <squid-dev@lists.squid-cache.org>