ENH: dropbear filter: see http://bugs.debian.org/546913

git-svn-id: https://fail2ban.svn.sourceforge.net/svnroot/fail2ban/branches/FAIL2BAN-0_8@768 a942ae1a-1317-0410-a47c-b1dcaea8d605

config/filter.d/dropbear.conf

@@ -0,0 +1,52 @@
+# Fail2Ban configuration file
+#
+# Author: Francis Russell
+#         Zak B. Elep
+#
+# $Revision$
+#
+# More information: http://bugs.debian.org/546913
+
+[INCLUDES]
+
+# Read common prefixes. If any customizations available -- read them from
+# common.local
+before = common.conf
+
+
+[Definition]
+
+_daemon = dropbear
+
+# Option:  failregex
+# Notes.:  regex to match the password failures messages in the logfile. The
+#          host must be matched by a group named "host". The tag "<HOST>" can
+#          be used for standard IP/hostname matching and is only an alias for
+#          (?:::f{4,6}:)?(?P<host>\S+)
+# Values:  TEXT
+
+# These match the unmodified dropbear messages. It isn't possible to
+# match the source of the 'exit before auth' messages from dropbear.
+#
+failregex = ^%(__prefix_line)slogin attempt for nonexistent user ('.*' )?from <HOST>:.*\s*$
+            ^%(__prefix_line)sbad password attempt for .+ from <HOST>:.*\s*$
+
+# The only line we need to match with the modified dropbear.
+
+# NOTE: The failregex below is ONLY intended to work with a patched
+# version of Dropbear as described here:
+# http://www.unchartedbackwaters.co.uk/pyblosxom/static/patches
+#
+# The standard Dropbear output doesn't provide enough information to
+# ban all types of attack.  The Dropbear patch adds IP address
+# information to the 'exit before auth' message which is always
+# produced for any form of non-successful login. It is that message
+# which this file matches.
+
+# failregex = ^%(__prefix_line)sexit before auth from <HOST>.*\s*$
+
+# Option:  ignoreregex
+# Notes.:  regex to ignore. If this regex matches, the line is ignored.
+# Values:  TEXT
+#
+ignoreregex =