--- /dev/null
+# MSN Messenger - Microsoft Network chat client
+# Pattern quality: good veryfast
+#
+# Usually uses port 1863
+# http://www.hypothetic.org/docs/msn/index.php
+#
+# This pattern has been tested and is believed to work well. If it does not
+# work for you, or you believe it could be improved, please post to
+# l7-filter-developers@lists.sf.net . This list may be subscribed to at
+# http://lists.sourceforge.net/lists/listinfo/l7-filter-developers
+
+msnmessenger
+# ver: allow versions up to 99.
+# usr (in case ver didn't work):
+^(ver [0-9]+ msnp[1-9][0-9]? [\x09-\x0d -~]* cvr|usr md5 i [ -~]*)