diff --git a/ChangeLog b/ChangeLog
index 29124261..dc37e55c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -54,6 +54,10 @@ releases.
 * New Actions:
     - `action.d/npf.conf` for NPF, the latest packet filter for NetBSD
 
+* New Filters:
+    - `filter.d/mongodb-auth.conf` for MongoDB (document-oriented NoSQL database engine)
+
+
 ### Enhancements
 * DateTemplate regexp extended with the word-end boundary, additionally to 
   word-start boundary
diff --git a/config/filter.d/mongodb-auth.conf b/config/filter.d/mongodb-auth.conf
new file mode 100644
index 00000000..66c27abb
--- /dev/null
+++ b/config/filter.d/mongodb-auth.conf
@@ -0,0 +1,49 @@
+# Fail2Ban filter for unsuccesfull MongoDB authentication attempts
+#
+# Logfile /var/log/mongodb/mongodb.log
+#
+# add setting in /etc/mongodb.conf
+# logpath=/var/log/mongodb/mongodb.log
+#
+# and use of the authentication
+# auth = true
+#
+
+[Definition]
+#failregex = ^\s+\[initandlisten\] connection accepted from <HOST>:\d+ \#(?P<__connid>\d+) \(1 connection now open\)<SKIPLINES>\s+\[conn(?P=__connid)\] Failed to authenticate\s+
+failregex = ^\s+\[conn(?P<__connid>\d+)\] Failed to authenticate [^\n]+<SKIPLINES>\s+\[conn(?P=__connid)\] end connection <HOST>
+
+ignoreregex =
+
+
+[Init]
+maxlines = 10
+
+# DEV Notes:
+#
+# Regarding the multiline regex:
+#
+# There can be a nunber of non-related lines between the first and second part
+# of this regex maxlines of 10 is quite generious.
+#
+# Note the capture __connid, includes the connection ID, used in second part of regex.
+#
+# The first regex is commented out (but will match also), because it is better to use
+# the host from "end connection" line (uncommented above):
+#  -  it has the same prefix, searching begins directly with failure message
+#     (so faster, because ignores success connections at all)
+#  -  it is not so vulnerable in case of possible race condition
+#
+# Log example:
+# 2016-10-20T09:54:27.108+0200 [initandlisten] connection accepted from 127.0.0.1:53276 #1 (1 connection now open)
+# 2016-10-20T09:54:27.109+0200 [conn1]  authenticate db: test { authenticate: 1, nonce: "xxx", user: "root", key: "xxx" }
+# 2016-10-20T09:54:27.110+0200 [conn1] Failed to authenticate root@test with mechanism MONGODB-CR: AuthenticationFailed UserNotFound Could not find user root@test
+# 2016-11-09T09:54:27.894+0100 [conn1] end connection 127.0.0.1:53276 (0 connections now open)
+# 2016-11-09T11:55:58.890+0100 [initandlisten] connection accepted from 127.0.0.1:54266 #1510 (1 connection now open)
+# 2016-11-09T11:55:58.892+0100 [conn1510]  authenticate db: admin { authenticate: 1, nonce: "xxx", user: "root", key: "xxx" }
+# 2016-11-09T11:55:58.892+0100 [conn1510] Failed to authenticate root@admin with mechanism MONGODB-CR: AuthenticationFailed key mismatch
+# 2016-11-09T11:55:58.894+0100 [conn1510] end connection 127.0.0.1:54266 (0 connections now open)
+#
+# Authors: Alexander Finkhäuser
+#          Sergey G. Brester (sebres)
+
diff --git a/config/jail.conf b/config/jail.conf
index 7200f4eb..d80e3d0a 100644
--- a/config/jail.conf
+++ b/config/jail.conf
@@ -731,6 +731,13 @@ logpath  = %(mysql_log)s
 backend  = %(mysql_backend)s
 
 
+# Log wrong MongoDB auth (for details see filter 'filter.d/mongodb-auth.conf')
+[mongodb-auth]
+# change port when running with "--shardsvr" or "--configsvr" runtime operation
+port     = 27017
+logpath  = /var/log/mongodb/mongodb.log
+
+
 # Jail for more extended banning of persistent abusers
 # !!! WARNINGS !!!
 # 1. Make sure that your loglevel specified in fail2ban.conf/.local
diff --git a/fail2ban/tests/files/logs/mongodb-auth b/fail2ban/tests/files/logs/mongodb-auth
new file mode 100644
index 00000000..8a308892
--- /dev/null
+++ b/fail2ban/tests/files/logs/mongodb-auth
@@ -0,0 +1,30 @@
+# failJSON: { "match": false }
+2016-11-20T00:04:00.110+0100 [conn1] Failed to authenticate root@admin with mechanism MONGODB-CR: AuthenticationFailed UserNotFound Could not find user root@admin
+# failJSON: { "time": "2016-11-20T00:04:00", "match": true , "host": "192.0.2.35" }
+2016-11-20T00:04:00.111+0100 [conn1] end connection 192.0.2.35:53276 (0 connections now open)
+
+# failJSON: { "match": false }
+2016-11-20T00:24:00.110+0100 [conn5] Failed to authenticate root@admin with mechanism MONGODB-CR: AuthenticationFailed UserNotFound Could not find user root@admin
+# failJSON: { "time": "2016-11-20T00:24:00", "match": true , "host": "192.0.2.171" }
+2016-11-20T00:24:00.111+0100 [conn5] end connection 192.0.2.171:53276 (0 connections now open)
+
+# failJSON: { "match": false }
+2016-11-20T00:24:00.110+0100 [conn334] Failed to authenticate root@admin with mechanism MONGODB-CR: AuthenticationFailed key mismatch
+# failJSON: { "time": "2016-11-20T00:24:00", "match": true , "host": "192.0.2.176" }
+2016-11-20T00:24:00.111+0100 [conn334] end connection 192.0.2.176:53276 (0 connections now open)
+
+# failJSON: { "match": false }
+2016-11-20T00:24:00.110+0100 [conn56] Failed to authenticate root@admin with mechanism MONGODB-CR: AuthenticationFailed key mismatch
+# failJSON: { "time": "2016-11-20T00:24:00", "match": true , "host": "192.0.2.1" }
+2016-11-20T00:24:00.111+0100 [conn56] end connection 192.0.2.1:53276 (0 connections now open)
+
+# failJSON: { "match": false }
+2016-11-20T12:54:02.370+0100 [initandlisten] connection accepted from 127.0.0.1:58774 #2261 (1 connection now open)
+# failJSON: { "match": false }
+2016-11-20T12:54:02.370+0100 [conn2261] end connection 127.0.0.1:58774 (0 connections now open)
+
+# failJSON: { "match": false }
+2016-11-20T13:07:49.781+0100 [conn2271]  authenticate db: admin { authenticate: 1, nonce: "xxx", user: "root", key: "xxx" }
+# failJSON: { "time": "2016-11-20T13:07:49", "match": false , "host": "192.0.2.178" }
+2016-11-20T13:07:49.834+0100 [conn2271] end connection 192.0.2.178:60268 (3 connections now open)
+