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:

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:

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) 1996-2025 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/