EXT\_WBINFO\_GROUP\_ACL(8) User Contributed Perl Documentation EXT\_WBINFO\_GROUP\_ACL(8)

# [NAME](#NAME)

```
 ext_wbinfo_group_acl - external ACL helper for Squid to verify NT Domain group membership using wbinfo.
```

# [SYNOPSIS](#SYNOPSIS)

```
 ext_wbinfo_group_acl [-dhK]
```

# [DESCRIPTION](#DESCRIPTION)

**ext\_wbinfo\_group\_acl** is an installed executable script. It uses **wbinfo** from Samba to lookup group membership of logged in users.

This helper must be used in with an authentication scheme (typically Basic or NTLM) based on Windows NT/2000 domain users.

It reads from the standard input the domain username and a list of groups and tries to match each against the groups membership of the specified username.

# [OPTIONS](#OPTIONS)

[**-d**](#d)

Write debug info to stderr.

[**-h**](#h)

Print the help.

[**-K**](#K)

Downgrade Kerberos credentials to NTLM.

# [CONFIGURATION](#CONFIGURATION)

```
  external_acl_type wbinfo_check %LOGIN /path/to/ext_wbinfo_group_acl
  acl allowed_group external wbinfo_check Group1 Group2
  http_access allow allowed_group
```

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

```
  external_acl_type wbinfo_check %LOGIN /path/to/perl /path/to/ext_wbinfo_group_acl
```

# [AUTHOR](#AUTHOR)

This program was written by Jerry Murdock <jmurdock@itraktech.com>

This manual was written by Amos Jeffries <amosjeffries@squid-cache.org>

# [COPYRIGHT](#COPYRIGHT)

```
 * Copyright (C) 1996-2026 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 Jerry Murdock
 <jmurdock@itraktech.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)

Questions on the usage of this program can be sent to the *Squid Users mailing list &lt;squid-users@lists.squid-cache.org*&gt;

# [REPORTING BUGS](#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 &lt;squid-bugs@lists.squid-cache.org*&gt;

Report ideas for new improvements to the *Squid Developers mailing list &lt;squid-dev@lists.squid-cache.org*&gt;

# [SEE ALSO](#SEE_ALSO)

The Squid FAQ wiki https://wiki.squid-cache.org/SquidFaq

The Squid Configuration Manual http://www.squid-cache.org/Doc/config/

2026-10-25 perl v5.44.0

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Document: ext_wbinfo_group_acl(8) from squid 7.7-r4 (Chainguard OS)
Source: https://github.com/squid-cache/squid.git