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ext_unix_group_acl - Man Page

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.

Known Issues

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 <rodrigo@geekbunker.org>

This manual was written by Henrik Nordstrom <hno@squid-cache.org>


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>

Additionally bugs or bug-fixes can be reported to Rodrigo Campos <rodrigo@geekbunker.org>

See Also

squid(8), group(5), passwd(5), GPL(7),
The Squid FAQ wiki https://wiki.squid-cache.org/SquidFaq
The Squid Configuration Manual http://www.squid-cache.org/Doc/config/

Referenced By


12 August 2002