1ext_session_acl(8)          System Manager's Manual         ext_session_acl(8)
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NAME

6       ext_session_acl - Squid session tracking external acl helper.
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8       Version 1.2
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SYNOPSIS

11       ext_session_acl [-t timeout ] [-b database ] [-a]
12

DESCRIPTION

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

23       -t timeout  Idle  timeout for any session. The default if not specified
24                   (set to 3600 seconds).
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26       -T timeout  Fixed timeout for any session. This will  end  the  session
27                   after  the timeout regardless of a user's activity. If used
28                   with active mode, this will terminate  the  user's  session
29                   after timeout , after which another LOGIN will be required.
30                   LOGOUT will reset the session and timeout.
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32       -b path     Path to persistent database. If a file  is  specified  then
33                   that  single  file  is  used  as the database. If a path is
34                   specified, a Berkeley DB database  environment  is  created
35                   within the directory. The advantage of the latter is better
36                   database support between multiple instances of the  session
37                   helper. Using multiple instances of the session helper with
38                   a single database file will cause synchronization  problems
39                   between  processes.   If  this  option is not specified the
40                   session details will be kept in memory only  and  all  ses‐
41                   sions  will  reset  each  time  Squid  restarts its helpers
42                   (Squid restart or rotation of logs).
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44       -a          Active mode. In this mode sessions are started by  evaluat‐
45                   ing  an  acl with the argument LOGIN , or terminated by the
46                   argument LOGOUT .  Without this flag the  helper  automati‐
47                   cally starts the session after the first request.
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CONFIGURATION

50       The  ext_session_acl helper is a concurrent helper; therefore, the con‐
51       currency= option must be specified in the configuration.
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53       Passive session configuration example using the default automatic mode
54              external_acl_type session ttl=300 negative_ttl=0 children=1 con‐
55              currency=200 %LOGIN /usr/local/squid/libexec/ext_session_acl
56              acl session external session
57              http_access deny !session
58              deny_info  http://your.server.example.com/bannerpage?url=%s ses‐
59              sion
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61       Then set up http://your.server.example.com/bannerpage to display a ses‐
62       sion  startup page and then redirect the user back to the requested URL
63       given in the url query parameter.
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AUTHOR

66       This program and documentation was written by  Henrik  Nordstrom  <hen‐
67       rik@henriknordstrom.net> Andrew Beverley <andy@andybev.com>
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70        *  Copyright (C) 1996-2019 The Squid Software Foundation and contribu‐
71       tors
72        *
73        * Squid software is distributed under GPLv2+ license and includes
74        * contributions from numerous individuals and organizations.
75        * Please see the COPYING and CONTRIBUTORS files for details.
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77       This program and documentation is copyright to the authors named above.
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79       Distributed under the GNU General Public License (GNU GPL) version 2 or
80       later (GPLv2+).
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QUESTIONS

83       Questions  on  the usage of this program can be sent to the Squid Users
84       mailing list <squid-users@lists.squid-cache.org>
85

REPORTING BUGS

87       Bug reports  need  to  be  made  in  English.   See  http://wiki.squid-
88       cache.org/SquidFaq/BugReporting for details of what you need to include
89       with your bug report.
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91       Report bugs or bug fixes using http://bugs.squid-cache.org/
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93       Report serious security bugs  to  Squid  Bugs  <squid-bugs@lists.squid-
94       cache.org>
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96       Report  ideas for new improvements to the Squid Developers mailing list
97       <squid-dev@lists.squid-cache.org>
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SEE ALSO

100       squid(8), GPL(7),
101       The Squid FAQ wiki http://wiki.squid-cache.org/SquidFaq
102       The Squid Configuration Manual http://www.squid-cache.org/Doc/config/
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106                                9 October 2011              ext_session_acl(8)
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