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+---
+layout: page
+title: Radicale 2.1.0
+---
+
+Radicale 2.1.0 is out!
+
+### 2.1.0 - Wild Radish
+
+This release is compatible with version 2.0.0. See
+[http://radicale.org/1to2/](http://radicale.org/1to2/) if you want to switch
+from 1.x.x to 2.1.0.
+
+* Built-in web interface for creating and managing address books and calendars
+  * can be extended with web plugins
+* Much faster storage backend
+* Significant reduction in memory usage
+* Improved logging
+  * Include paths (of invalid items / requests) in log messages
+  * Include configuration values causing problems in log messages
+  * Log warning message for invalid requests by clients
+  * Log error message for invalid files in the storage backend
+  * No stack traces unless debugging is enabled
+* Time range filter also regards overwritten recurrences
+* Items that couldn't be filtered because of bugs in VObject are always
+  returned (and a warning message is logged)
+* Basic error checking of configuration files
+* File system locking isn't disabled implicitly anymore, instead a new
+  configuration option gets introduced
+* The permissions of the lock file are not changed anymore
+* Support for sync-token
+* Support for client-side SSL certificates
+* Rights plugins can decide if access to an item is granted explicitly
+  * Respond with 403 instead of 404 for principal collections of non-existing
+    users when ``owner_only`` plugin is used (information leakage)
+* Authentication plugins can provide the login and password from the
+  environment
+  * new ``remote_user`` plugin, that gets the login from the ``REMOTE_USER``
+    environment variable (for WSGI server)
+  * new ``http_x_remote_user`` plugin, that gets the login from the
+    ``X-Remote-User`` HTTP header (for reverse proxies)