ext_unix_group_acl(8) Squid UNIX Group ACL helper


ext_unix_group_acl [-d] [-g group ] [-g group ...] [-p] [-s]


ext_unix_group_acl allows Squid to base access controls on users memberships in UNIX groups.


Write debug info to stderr. -g group Specifies a group name to match.
Also match the users primary group from /etc/passwd
Strip NT domain name component from user names (/ or \ separated)


This squid.conf example defines two Squid acls. usergroup1 matches users in group1 , and usergroup2 matches users in group2 or group3
external_acl_type unix_group %LOGIN /usr/local/squid/libexec/ext_unix_group_acl -p
acl usergroup1 external unix_group group1
acl usergroup2 external unix_group group2 group3

By default up to 11 groups can be matched in one acl (including commandline specified groups). This limit is defined by MAX_GROUPS in the source code.


Does not understand GID aliased groups sometimes used to work around groups size limitations. If you are using GID aliased groups then you must specify each alias by name.


This program was written by Rodrigo Campos <[email protected]>

This manual was written by Henrik Nordstrom <[email protected]>


 * Copyright (C) 1996-2016 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 and documentation is copyright to the authors named above.

Distributed under the GNU General Public License (GNU GPL) version 2 or later (GPLv2+).


Questions on the usage of this program can be sent to the Squid Users mailing list <[email protected]>


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.

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

Report serious security bugs to Squid Bugs <[email protected]>

Report ideas for new improvements to the Squid Developers mailing list <[email protected]>

Additionally bugs or bug-fixes can be reported to Rodrigo Campos <[email protected]>