If the IP or user agent changes after creating the session, the a 400 response is given to the request, the session is flushed (all session data deleted, new session created) and a warning is logged. The goal of this middleware is to make it harder for an attacker to use a session ID they obtained. It does not make abuse of session IDs impossible.

For compatibility with IPv6 privacy extensions, by default only the first 64 bits of an IPv6 address are checked.

Documentation

The full documentation is at https://django-restricted-sessions.readthedocs.org.

Quickstart

Install django-restricted-sessions::

pip install django-restricted-sessions

Then add it to your middleware after SessionMiddleware::

MIDDLEWARE = [
    "django.middleware.security.SecurityMiddleware",
    "django.contrib.sessions.middleware.SessionMiddleware",
    'restrictedsessions.middleware.RestrictedSessionsMiddleware',
    ....
]

If you use RESTRICTEDSESSIONS_AUTHED_ONLY, ensure this middleware is added after AuthenticationMiddleware so that the request.user is present.

History

0.4.0 (2023-06-02) ++++++++++++++++++

Updated Django support to only 3.2, 4.1 and 4.2 (thanks to @ronnievdc).
Various other cleanups and documentation format fixes.

0.3.0 (2019-12-03) ++++++++++++++++++

Updated Django support to 1.11, 2.2 and 3.0.
Fixed issues when X_FORWARDED_FOR contains multiple addresses.

0.2.0 (2017-04-06) ++++++++++++++++++

For Django 1.10+ support, changed from object to django.utils.deprecation.MiddlewareMixin
Added PyPI trove classifiers for Django versions and more Python versions
Updated travis.yml for more Python versions

0.1.4 (2016-07-02) ++++++++++++++++++

Fixed an exception that could occur when non-utf8 bytes were included in user agent strings.

0.1.3.1 (2016-05-26) ++++++++++++++++++++

Version bump to avoid PyPI's duplicate filename ban.

0.1.3 (2016-05-26) ++++++++++++++++++

Added support to redirect to known view, or use custom status code settings.
Added support for ignoring unauthenticated sessions.
Fixed short circuit when REMOTE_ADDR was unknown.
Dropped support for older Python versions: now requires 2.7, 3.3 or newer, with Django 1.8.

0.1.2 (2014-03-20) ++++++++++++++++++

Resolved exception being raised when session switches from IPv4 to IPv6
Python 3.4 support

0.1.1 (2014-02-18) ++++++++++++++++++

Added missing netaddr requirement to setup.py.

0.1.0 (2014-02-17) ++++++++++++++++++

First release on PyPI.

Keywords

django-restricted-sessions

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