filter.d/vsftpd.conf: optional reason message after FAIL LOGIN, closes #1543

ChangeLog

@@ -32,6 +32,9 @@ releases.
     - Extended failregex and test cases to handle ASSP V1 and V2 (gh-1494)
 * `filter.d/postfix-sasl.conf`
     - Allow for having no trailing space after 'failed:' (gh-1497)
+* `filter.d/vsftpd.conf`
+    - Optional reason part in message after FAIL LOGIN (gh-1543)
+
 
 ### New Features
 

config/filter.d/vsftpd.conf

@@ -14,7 +14,7 @@ __pam_re=\(?%(__pam_auth)s(?:\(\S+\))?\)?:?
 _daemon =  vsftpd
 
 failregex = ^%(__prefix_line)s%(__pam_re)s\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=(ftp)? ruser=\S* rhost=<HOST>(?:\s+user=.*)?\s*$
-            ^ \[pid \d+\] \[.+\] FAIL LOGIN: Client "<HOST>"\s*$
+            ^ \[pid \d+\] \[[^\]]+\] FAIL LOGIN: Client "<HOST>"(?:\s*$|,)
 
 ignoreregex = 
 

fail2ban/tests/files/logs/vsftpd

@@ -12,3 +12,6 @@ Fri Jan 19 12:20:33 2007 [pid 27202] [anonymous] FAIL LOGIN: Client "64.106.46.9
 
 # failJSON: { "time": "2004-10-23T21:15:42", "match": true , "host": "58.254.172.161" }
 Oct 23 21:15:42 vps vsftpd: pam_unix(vsftpd:auth): authentication failure; logname= uid=0 euid=0 tty=ftp ruser=test rhost=58.254.172.161
+
+# failJSON: { "time": "2016-09-08T00:39:49", "match": true , "host": "192.0.2.1" }
+Thu Sep  8 00:39:49 2016 [pid 15019] [guest] FAIL LOGIN: Client "::ffff:192.0.2.1", "User is not in the allow user list."