Update Kerio Connect filter (#1455)

* Update Kerio Connect filter

Fixed regex for some log entries that did not get recognized and some additional error formats are added.

* Add missing colon, GitHub address

* Add filter tests

* Add missing test

config/filter.d/kerio.conf

@@ -3,9 +3,14 @@
 [Definition]
 
 failregex = ^ SMTP Spam attack detected from <HOST>,
-            ^ IP address <HOST> found in DNS blacklist \S+, mail from \S+ to \S+$
+            ^ IP address <HOST> found in DNS blacklist
             ^ Relay attempt from IP address <HOST>
             ^ Attempt to deliver to unknown recipient \S+, from \S+, IP address <HOST>$
+            ^ Failed SMTP login from <HOST>
+            ^ SMTP: User \S+ doesn't exist. Attempt from IP address <HOST>
+            ^ Client with IP address <HOST> has no reverse DNS entry, connection rejected before SMTP greeting$
+            ^ Administration login into Web Administration from <HOST> failed: IP address not allowed$
+            ^ Message from IP address <HOST>, sender \S+ rejected: sender domain does not exist$
 
 ignoreregex =
 
@@ -16,5 +21,6 @@ datepattern = ^\[%%d/%%b/%%Y %%H:%%M:%%S\]
 # DEV NOTES:
 # 
 # Author: A.P. Lawrence
+# Updated by: M. Bischoff <https://github.com/herrbischoff>
 #
 # Based off: http://aplawrence.com/Kerio/fail2ban.html

fail2ban/tests/files/logs/kerio

@@ -25,5 +25,20 @@
 # failJSON: { "time": "2013-12-13T01:11:04", "match": true, "host": "218.85.253.185" }
 [13/Dec/2013 01:11:04] Attempt to deliver to unknown recipient <marge@aplawrence.com>, from <yu@rrd.com>, IP address 218.85.253.185
 
+# failJSON: { "time": "2017-05-29T17:29:29", "match": true, "host": "185.140.108.56" }
+[29/May/2017 17:29:29] IP address 185.140.108.56 found in DNS blacklist SpamCop, mail from <noreply-tjgqNffcgPfpbZtpDzasm@oakspaversusa.com> to <info@verinion.com> rejected
 
+# failJSON: { "time": "2017-05-17T19:43:42", "match": true, "host": "185.140.108.26" }
+[17/May/2017 19:43:42] SMTP: User printer@verinion.com doesn't exist. Attempt from IP address 185.140.108.26.
 
+# failJSON: { "time": "2017-05-17T19:44:25", "match": true, "host": "184.171.168.211" }
+[17/May/2017 19:44:25] Client with IP address 184.171.168.211 has no reverse DNS entry, connection rejected before SMTP greeting
+
+# failJSON: { "time": "2017-05-17T19:45:27", "match": true, "host": "170.178.167.136" }
+[17/May/2017 19:45:27] Administration login into Web Administration from 170.178.167.136 failed: IP address not allowed
+
+# failJSON: { "time": "2017-05-17T22:14:57", "match": true, "host": "67.211.219.82" }
+[17/May/2017 22:14:57] Message from IP address 67.211.219.82, sender <promo123@goodresponse.site> rejected: sender domain does not exist
+
+# failJSON: { "time": "2017-05-18T07:25:15", "match": true, "host": "212.92.127.112" }
+[18/May/2017 07:25:15] Failed SMTP login from 212.92.127.112 with SASL method CRAM-MD5.