ext_file_userip_acl(8)

NAME
ext_file_userip_acl - Restrict users to certain IP addresses, using a text file backend.

Version 1.0

SYNOPSIS
ext_file_userip_acl [-dh] [-f file name ]

DESCRIPTION
ext_file_userip_acl is an installed binary. An external helper for the Squid external acl scheme.

It works by reading a pair composed by an IP address and an username on STDIN and matching it against a configuration file.

OPTIONS

-d  Write debug info to stderr.

-f file
    Configuration file to load.

-h  Display the binary help and command line syntax info using stderr.

CONFIGURATION

The squid.conf configuration for the external ACL should be:
    external_acl_type type-name %SRC %LOGIN /path/to/ext_file_userip_acl -f /path/to/config.file

If the helper program finds a matching username/ip in the configuration file, it returns OK , otherwise it returns ERR .

The configuration file format is as follows:
    ip_addr[/netmask]    username|@group|ALL|NONE

Where ip_addr is a dotted quad format IP address, the netmask must be in dotted quad format too.

When the second parameter is prefixed with an @ , the program will lookup the /etc/group file entry for the specified username.

There are other two directives, ALL and NONE , which mean "any user on this IP address may authenticate" or "no user on this IP address may authenticate".

AUTHOR
This program was written by Rodrigo Campos <rodrigo@geekbunker.org>

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

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 and documentation is copyright to the authors named above.

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

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>

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