diff --git a/cas_server/templates/cas_server/logged.html b/cas_server/templates/cas_server/logged.html
index 7eb0378..9c8bb38 100644
--- a/cas_server/templates/cas_server/logged.html
+++ b/cas_server/templates/cas_server/logged.html
@@ -4,6 +4,13 @@
 {% load i18n %}
 {% block content %}
 <div class="alert alert-success" role="alert">{% trans "Logged" %}</div>
-{% bootstrap_button _('Logout') size='lg' button_class="btn-danger btn-block" href="logout" %}
+<form class="form-signin" method="get" action="logout">
+  <div class="checkbox">
+    <label>
+      <input type="checkbox" name="all" value="1"> {% trans "Log me out from all my sessions" %}
+    </label>
+  </div>
+  {% bootstrap_button _('Logout') size='lg' button_type="submit" button_class="btn-danger btn-block"%}
+</form>
 {% endblock %}
 
diff --git a/cas_server/views.py b/cas_server/views.py
index 4244e37..e88e2cb 100644
--- a/cas_server/views.py
+++ b/cas_server/views.py
@@ -26,6 +26,7 @@ from django.views.generic import View
 import requests
 from lxml import etree
 from datetime import timedelta
+from importlib import import_module
 
 import cas_server.utils as utils
 import cas_server.forms as forms
@@ -35,6 +36,8 @@ from .utils import JsonResponse
 from .models import ServiceTicket, ProxyTicket, ProxyGrantingTicket
 from .models import ServicePattern
 
+SessionStore = import_module(settings.SESSION_ENGINE).SessionStore
+
 
 class AttributesMixin(object):
     """mixin for the attributs methode"""
@@ -55,36 +58,30 @@ class AttributesMixin(object):
 
 class LogoutMixin(object):
     """destroy CAS session utils"""
-    def clean_session_variables(self):
-        """Clean sessions variables"""
-        try:
-            del self.request.session["authenticated"]
-        except KeyError:
-            pass
-        try:
-            del self.request.session["username"]
-        except KeyError:
-            pass
-        try:
-            del self.request.session["warn"]
-        except KeyError:
-            pass
-
-    def logout(self):
+    def logout(self, all=False):
         """effectively destroy CAS session"""
+        # logout the user from the current session
         try:
+            username = self.request.session.get("username")
             user = models.User.objects.get(
-                username=self.request.session.get("username"),
+                username=username,
                 session_key=self.request.session.session_key
             )
-            self.clean_session_variables()
             self.request.session.flush()
             user.logout(self.request)
             user.delete()
         except models.User.DoesNotExist:
-            self.clean_session_variables()
+            # if user not found in database, flush the session anyway
             self.request.session.flush()
 
+        # If all is set logout user from alternative sessions
+        if all:
+            for user in models.User.objects.filter(username=username):
+                session = SessionStore(session_key=user.session_key)
+                session.flush()
+                user.logout(self.request)
+                user.delete()
+
 
 class LogoutView(View, LogoutMixin):
     """destroy CAS session (logout) view"""
@@ -101,7 +98,7 @@ class LogoutView(View, LogoutMixin):
     def get(self, request, *args, **kwargs):
         """methode called on GET request on this view"""
         self.init_get(request)
-        self.logout()
+        self.logout(self.request.GET.get("all"))
         # if service is set, redirect to service after logout
         if self.service:
             list(messages.get_messages(request))  # clean messages before leaving the django app