Ubuntu Manpage: ext_session_acl - Squid session tracking external acl helper.

Provided by: squid_3.5.27-1ubuntu1.14_amd64

NAME

       ext_session_acl - Squid session tracking external acl helper.

       Version 1.2

SYNOPSIS

       ext_session_acl [-t timeout ] [-b database ] [-a]

DESCRIPTION

       ext_session_acl  maintains  a  concept  of  sessions by monitoring requests and timing out
       sessions. The timeout is based either on idle use ( -t ) or a fixed period of time ( -T ).
       The  former  is  suitable  for  displaying  terms  and conditions to a user; the latter is
       suitable for the display of advertisements or other notices (both as a splash page  -  see
       config examples in the wiki online). The session helper can also be used to force users to
       re-authenticate if the %LOGIN and -a are both used.

OPTIONS

-t timeout Idle timeout for any session. The default if not specified (set to 3600
seconds).

-T timeout Fixed timeout for any session. This will end the session after the timeout
regardless of a user's activity. If used with active mode, this will terminate
the user's session after timeout , after which another LOGIN will be required.
LOGOUT will reset the session and timeout.

-b path Path to persistent database. If a file is specified then that single file is
used as the database. If a path is specified, a Berkeley DB database
environment is created within the directory. The advantage of the latter is
better database support between multiple instances of the session helper.
Using multiple instances of the session helper with a single database file
will cause synchronization problems between processes. If this option is not
specified the session details will be kept in memory only and all sessions
will reset each time Squid restarts its helpers (Squid restart or rotation of
logs).

-a Active mode. In this mode sessions are started by evaluating an acl with the
argument LOGIN , or terminated by the argument LOGOUT . Without this flag the
helper automatically starts the session after the first request.

CONFIGURATION

       The ext_session_acl helper is a concurrent helper; therefore, the concurrency= option must
       be specified in the configuration.

       Passive session configuration example using the default automatic mode
              external_acl_type  session ttl=300 negative_ttl=0 children=1 concurrency=200 %LOGIN
              /usr/local/squid/libexec/ext_session_acl
              acl session external session
              http_access deny !session
              deny_info http://your.server.example.com/bannerpage?url=%s session

       Then set up http://your.server.example.com/bannerpage to display a  session  startup  page
       and then redirect the user back to the requested URL given in the url query parameter.

AUTHOR

       This     program     and     documentation     was    written    by    Henrik    Nordstrom
       <henrik@henriknordstrom.net> Andrew Beverley <andy@andybev.com>

COPYRIGHT

        * Copyright (C) 1996-2017 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@squid-cache.org>

REPORTING BUGS

       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 <squid-bugs@squid-cache.org>

       Report  ideas  for new improvements to the Squid Developers mailing list <squid-dev@squid-
       cache.org>