Add default fail2ban configuration.

This only adds the main config files, not the action and filter
configurations. These will be used in the default form mostly, so let's
not clutter the repository with them (and updates to them for upgrades
of fail2ban).

diff --git a/etc/fail2ban/fail2ban.conf b/etc/fail2ban/fail2ban.conf
new file mode 100644 (file)
index 0000000..703a0ea
--- /dev/null
+++ b/etc/fail2ban/fail2ban.conf
@@ -0,0 +1,34 @@
+# Fail2Ban configuration file
+#
+# Author: Cyril Jaquier
+#
+# $Revision: 629 $
+#
+
+[Definition]
+
+# Option:  loglevel
+# Notes.:  Set the log level output.
+#          1 = ERROR
+#          2 = WARN
+#          3 = INFO
+#          4 = DEBUG
+# Values:  NUM  Default:  3
+#
+loglevel = 3
+
+# Option:  logtarget
+# Notes.:  Set the log target. This could be a file, SYSLOG, STDERR or STDOUT.
+#          Only one log target can be specified.
+# Values:  STDOUT STDERR SYSLOG file  Default:  /var/log/fail2ban.log
+#
+logtarget = /var/log/fail2ban.log
+
+# Option: socket
+# Notes.: Set the socket file. This is used to communicate with the daemon. Do
+#         not remove this file when Fail2ban runs. It will not be possible to
+#         communicate with the server afterwards.
+# Values: FILE  Default:  /var/run/fail2ban/fail2ban.sock
+#
+socket = /var/run/fail2ban/fail2ban.sock
+

diff --git a/etc/fail2ban/jail.conf b/etc/fail2ban/jail.conf
new file mode 100644 (file)
index 0000000..ce9c7eb
--- /dev/null
+++ b/etc/fail2ban/jail.conf
@@ -0,0 +1,282 @@
+# Fail2Ban configuration file.
+#
+# This file was composed for Debian systems from the original one
+#  provided now under /usr/share/doc/fail2ban/examples/jail.conf
+#  for additional examples.
+#
+# To avoid merges during upgrades DO NOT MODIFY THIS FILE
+# and rather provide your changes in /etc/fail2ban/jail.local
+#
+# Author: Yaroslav O. Halchenko <debian@onerussian.com>
+#
+# $Revision: 281 $
+#
+
+# The DEFAULT allows a global definition of the options. They can be override
+# in each jail afterwards.
+
+[DEFAULT]
+
+# "ignoreip" can be an IP address, a CIDR mask or a DNS host
+ignoreip = 127.0.0.1
+bantime  = 600
+maxretry = 3
+
+# "backend" specifies the backend used to get files modification. Available
+# options are "gamin", "polling" and "auto".
+# yoh: For some reason Debian shipped python-gamin didn't work as expected
+#      This issue left ToDo, so polling is default backend for now
+backend = polling
+
+#
+# Destination email address used solely for the interpolations in
+# jail.{conf,local} configuration files.
+destemail = root@localhost
+
+#
+# ACTIONS
+#
+
+# Default banning action (e.g. iptables, iptables-new,
+# iptables-multiport, shorewall, etc) It is used to define 
+# action_* variables. Can be overriden globally or per 
+# section within jail.local file
+banaction = iptables-multiport
+
+# email action. Since 0.8.1 upstream fail2ban uses sendmail
+# MTA for the mailing. Change mta configuration parameter to mail
+# if you want to revert to conventional 'mail'.
+mta = sendmail
+
+# Default protocol
+protocol = tcp
+
+#
+# Action shortcuts. To be used to define action parameter
+
+# The simplest action to take: ban only
+action_ = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s]
+
+# ban & send an e-mail with whois report to the destemail.
+action_mw = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s]
+              %(mta)s-whois[name=%(__name__)s, dest="%(destemail)s", protocol="%(protocol)s]
+
+# ban & send an e-mail with whois report and relevant log lines
+# to the destemail.
+action_mwl = %(banaction)s[name=%(__name__)s, port="%(port)s", protocol="%(protocol)s]
+               %(mta)s-whois-lines[name=%(__name__)s, dest="%(destemail)s", logpath=%(logpath)s]
+ 
+# Choose default action.  To change, just override value of 'action' with the
+# interpolation to the chosen action shortcut (e.g.  action_mw, action_mwl, etc) in jail.local
+# globally (section [DEFAULT]) or per specific section 
+action = %(action_)s
+
+#
+# JAILS
+#
+
+# Next jails corresponds to the standard configuration in Fail2ban 0.6 which
+# was shipped in Debian. Enable any defined here jail by including
+#
+# [SECTION_NAME] 
+# enabled = true
+
+#
+# in /etc/fail2ban/jail.local.
+#
+# Optionally you may override any other parameter (e.g. banaction,
+# action, port, logpath, etc) in that section within jail.local
+
+[ssh]
+
+enabled = true
+port   = ssh
+filter = sshd
+logpath  = /var/log/auth.log
+maxretry = 6
+
+# Generic filter for pam. Has to be used with action which bans all ports
+# such as iptables-allports, shorewall
+[pam-generic]
+
+enabled = false
+# pam-generic filter can be customized to monitor specific subset of 'tty's
+filter = pam-generic
+# port actually must be irrelevant but lets leave it all for some possible uses
+port = all
+banaction = iptables-allports
+port     = anyport
+logpath  = /var/log/auth.log
+maxretry = 6
+
+[xinetd-fail]
+
+enabled   = false
+filter    = xinetd-fail
+port      = all
+banaction = iptables-multiport-log
+logpath   = /var/log/daemon.log
+maxretry  = 2
+
+
+[ssh-ddos]
+
+enabled = false
+port    = ssh
+filter  = sshd-ddos
+logpath  = /var/log/auth.log
+maxretry = 6
+
+#
+# HTTP servers
+#
+
+[apache]
+
+enabled = false
+port   = http,https
+filter = apache-auth
+logpath = /var/log/apache*/*error.log
+maxretry = 6
+
+# default action is now multiport, so apache-multiport jail was left
+# for compatibility with previous (<0.7.6-2) releases
+[apache-multiport]
+
+enabled   = false
+port     = http,https
+filter   = apache-auth
+logpath   = /var/log/apache*/*error.log
+maxretry  = 6
+
+[apache-noscript]
+
+enabled = false
+port    = http,https
+filter  = apache-noscript
+logpath = /var/log/apache*/*error.log
+maxretry = 6
+
+[apache-overflows]
+
+enabled = false
+port    = http,https
+filter  = apache-overflows
+logpath = /var/log/apache*/*error.log
+maxretry = 2
+
+#
+# FTP servers
+#
+
+[vsftpd]
+
+enabled  = false
+port    = ftp,ftp-data,ftps,ftps-data
+filter   = vsftpd
+logpath  = /var/log/vsftpd.log
+# or overwrite it in jails.local to be
+# logpath = /var/log/auth.log
+# if you want to rely on PAM failed login attempts
+# vsftpd's failregex should match both of those formats
+maxretry = 6
+
+
+[proftpd]
+
+enabled  = false
+port    = ftp,ftp-data,ftps,ftps-data
+filter   = proftpd
+logpath  = /var/log/proftpd/proftpd.log
+maxretry = 6
+
+
+[wuftpd]
+
+enabled  = false
+port    = ftp,ftp-data,ftps,ftps-data
+filter   = wuftpd
+logpath  = /var/log/auth.log
+maxretry = 6
+
+
+#
+# Mail servers
+#
+
+[postfix]
+
+enabled  = false
+port    = smtp,ssmtp
+filter   = postfix
+logpath  = /var/log/mail.log
+
+
+[couriersmtp]
+
+enabled  = false
+port    = smtp,ssmtp
+filter   = couriersmtp
+logpath  = /var/log/mail.log
+
+
+#
+# Mail servers authenticators: might be used for smtp,ftp,imap servers, so
+# all relevant ports get banned
+#
+
+[courierauth]
+
+enabled  = false
+port    = smtp,ssmtp,imap2,imap3,imaps,pop3,pop3s
+filter   = courierlogin
+logpath  = /var/log/mail.log
+
+
+[sasl]
+
+enabled  = false
+port    = smtp,ssmtp,imap2,imap3,imaps,pop3,pop3s
+filter   = sasl
+logpath  = /var/log/mail.log
+
+
+# DNS Servers
+
+
+# These jails block attacks against named (bind9). By default, logging is off
+# with bind9 installation. You will need something like this:
+#
+# logging {
+#     channel security_file {
+#         file "/var/log/named/security.log" versions 3 size 30m;
+#         severity dynamic;
+#         print-time yes;
+#     };
+#     category security {
+#         security_file;
+#     };
+# }
+#
+# in your named.conf to provide proper logging
+
+# Word of Caution:
+# Given filter can lead to DoS attack against your DNS server
+# since there is no way to assure that UDP packets come from the
+# real source IP
+[named-refused-udp]
+
+enabled  = false
+port     = domain,953
+protocol = udp
+filter   = named-refused
+logpath  = /var/log/named/security.log
+
+[named-refused-tcp]
+
+enabled  = false
+port     = domain,953
+protocol = tcp
+filter   = named-refused
+logpath  = /var/log/named/security.log
+