Subversion Repositories ALCASAR

Rev

Go to most recent revision | Blame | Last modification | View Log

FAIL_CONF="/etc/fail2ban/fail2ban.conf"
JAIL_CONF="/etc/fail2ban/jail.conf"
DIR_FILTER="/etc/fail2ban/filter.d/"
ACTION_ALLPORTS="/etc/fail2ban/action.d/iptables-allports.conf"

if(test -f $FAIL_CONF)
then
        mv $FAIL_CONF $FAIL_CONF.old
fi

if(test -f $JAIL_CONF)
then
        mv $JAIL_CONF $JAIL_CONF.old
fi

#########################################################
## Mise à jour du fichier de configuration de fail2ban ##
#########################################################

cat << EOF > $FAIL_CONF

[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
EOF

#########################################################
## Mise à jour de la configuration de jail de fail2ban ##
#########################################################

cat << EOF > $JAIL_CONF

# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
# $Revision$
#

# The DEFAULT allows a global definition of the options. They can be overridden
# in each jail afterwards.

[DEFAULT]

# "ignoreip" can be an IP address, a CIDR mask or a DNS host. Fail2ban will not
# ban a host which matches an address in this list. Several addresses can be
# defined using space separator.
ignoreip = 127.0.0.1/8

# "bantime" is the number of seconds that a host is banned.
bantime  = 600

# A host is banned if it has generated "maxretry" during the last "findtime"
# seconds.
# Un client est banni dans le cas ou il genere "maxretry" pendant le temps
# findtime en seconds
# Ici 5 requetes remplissant les filtres en 60 secondes

findtime  = 60

# "maxretry" is the number of failures before a host get banned.
maxretry = 5

# "backend" specifies the backend used to get files modification. Available
# options are "gamin", "polling" and "auto". This option can be overridden in
# each jail too (use "gamin" for a jail and "polling" for another).
#
# gamin:   requires Gamin (a file alteration monitor) to be installed. If Gamin
#          is not installed, Fail2ban will use polling.
# polling: uses a polling algorithm which does not require external libraries.
# auto:    will choose Gamin if available and polling otherwise.
backend = auto


# This jail corresponds to the standard configuration in Fail2ban 0.6.
# The mail-whois action send a notification e-mail with a whois request
# in the body.


# Bannissement si Mod_evasive bannie un @IP après 2 interdit par Apache alors BAN sur tous les ports

[mod-evasive]

enabled = true
#enabled = false
filter = mod-evasive
action = iptables-allports[name=mod-evasive]
logpath = /var/log/httpd/error_log
maxretry = 2

# Bannissement pour SSH-Brute-Force

[ssh-iptables]

enabled = true
#enabled  = false
filter   = sshd
action   = iptables-allports[name=SSH]
logpath  = /var/log/auth.log
maxretry = 3

# Bannissement si 5 tentatives de connexion echouer en alcasar/acc

[htdigest]

enabled = true
#enabled = false
filter = htdigest
action = iptables-allports[name=htdigest]
logpath = /var/log/httpd/ssl_error_log
maxretry = 5

# Bannissement si 5 tentatives de connexion avec intercept.php avec reason=reject

[intercept]

enabled = true
#enabled = false
filter = intercept
action = iptables-allports[name=intercept]
logpath = /var/log/httpd/ssl_request_log
maxretry = 5

# Bannissement si 5 tentatives de changement de mot de passe en moins de 1 min
# 5 POST pour changer le mot de passe que le POST soit ok ou non.

[mot_de_passe]

enabled = true
#enabled = false
filter = mot_de_passe
action = iptables-allports[name=Mot_de_Passe]
logpath = /var/log/httpd/ssl_request_log
maxretry = 5


[proftpd-iptables]

enabled  = false
filter   = proftpd
action   = iptables[name=ProFTPD, port=ftp, protocol=tcp]
           sendmail-whois[name=ProFTPD, dest=you@example.com]
logpath  = /var/log/proftpd/proftpd.log
maxretry = 6

# This jail forces the backend to "polling".

[sasl-iptables]

enabled  = false
filter   = sasl
backend  = polling
action   = iptables[name=sasl, port=smtp, protocol=tcp]
           sendmail-whois[name=sasl, dest=you@example.com]
logpath  = /var/log/mail.log

# Here we use TCP-Wrappers instead of Netfilter/Iptables. "ignoreregex" is
# used to avoid banning the user "myuser".

[ssh-tcpwrapper]

enabled     = false
filter      = sshd
action      = hostsdeny
              sendmail-whois[name=SSH, dest=you@example.com]
ignoreregex = for myuser from
logpath     = /var/log/auth.log

# This jail demonstrates the use of wildcards in "logpath".
# Moreover, it is possible to give other files on a new line.

[apache-tcpwrapper]

enabled  = false
filter   = apache-auth
action   = hostsdeny
logpath  = /var/log/apache*/*error.log
           /home/www/myhomepage/error.log
maxretry = 6

# The hosts.deny path can be defined with the "file" argument if it is
# not in /etc.

[postfix-tcpwrapper]

enabled  = false
filter   = postfix
action   = hostsdeny[file=/not/a/standard/path/hosts.deny]
           sendmail[name=Postfix, dest=you@example.com]
logpath  = /var/log/postfix.log
bantime  = 300

# Do not ban anybody. Just report information about the remote host.
# A notification is sent at most every 600 seconds (bantime).

[vsftpd-notification]

enabled  = false
filter   = vsftpd
action   = sendmail-whois[name=VSFTPD, dest=you@example.com]
logpath  = /var/log/vsftpd.log
maxretry = 5
bantime  = 1800

# Same as above but with banning the IP address.

[vsftpd-iptables]

enabled  = false
filter   = vsftpd
action   = iptables[name=VSFTPD, port=ftp, protocol=tcp]
           sendmail-whois[name=VSFTPD, dest=you@example.com]
logpath  = /var/log/vsftpd.log
maxretry = 5
bantime  = 1800

# Ban hosts which agent identifies spammer robots crawling the web
# for email addresses. The mail outputs are buffered.

[apache-badbots]

enabled  = false
filter   = apache-badbots
action   = iptables-multiport[name=BadBots, port="http,https"]
           sendmail-buffered[name=BadBots, lines=5, dest=you@example.com]
logpath  = /var/www/*/logs/access_log
bantime  = 172800
maxretry = 1

# Use shorewall instead of iptables.

[apache-shorewall]

enabled  = false
filter   = apache-noscript
action   = shorewall
           sendmail[name=Postfix, dest=you@example.com]
logpath  = /var/log/apache2/error_log

# Ban attackers that try to use PHP's URL-fopen() functionality
# through GET/POST variables. - Experimental, with more than a year
# of usage in production environments.

[php-url-fopen]

enabled = false
port    = http,https
filter  = php-url-fopen
logpath = /var/www/*/logs/access_log
maxretry = 1

# A simple PHP-fastcgi jail which works with lighttpd.
# If you run a lighttpd server, then you probably will
# find these kinds of messages in your error_log:
# ALERT – tried to register forbidden variable ‘GLOBALS’
# through GET variables (attacker '1.2.3.4', file '/var/www/default/htdocs/index.php')
# This jail would block the IP 1.2.3.4.

[lighttpd-fastcgi]

enabled = false
port    = http,https
filter  = lighttpd-fastcgi
# adapt the following two items as needed
logpath = /var/log/lighttpd/error.log
maxretry = 2

# This jail uses ipfw, the standard firewall on FreeBSD. The "ignoreip"
# option is overridden in this jail. Moreover, the action "mail-whois" defines
# the variable "name" which contains a comma using "". The characters '' are
# valid too.

[ssh-ipfw]

enabled  = false
filter   = sshd
action   = ipfw[localhost=192.168.0.1]
           sendmail-whois[name="SSH,IPFW", dest=you@example.com]
logpath  = /var/log/auth.log
ignoreip = 168.192.0.1

# 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.
# This jail blocks UDP traffic for DNS requests.

# !!! WARNING !!!
#   Since UDP is connection-less protocol, spoofing of IP and imitation
#   of illegal actions is way too simple.  Thus enabling of this filter
#   might provide an easy way for implementing a DoS against a chosen
#   victim. See
#    http://nion.modprobe.de/blog/archives/690-fail2ban-+-dns-fail.html
#   Please DO NOT USE this jail unless you know what you are doing.
#
# [named-refused-udp]
#
# enabled  = false
# filter   = named-refused
# action   = iptables-multiport[name=Named, port="domain,953", protocol=udp]
#            sendmail-whois[name=Named, dest=you@example.com]
# logpath  = /var/log/named/security.log
# ignoreip = 168.192.0.1

# This jail blocks TCP traffic for DNS requests.

[named-refused-tcp]

enabled  = false
filter   = named-refused
action   = iptables-multiport[name=Named, port="domain,953", protocol=tcp]
           sendmail-whois[name=Named, dest=you@example.com]
logpath  = /var/log/named/security.log
ignoreip = 168.192.0.1

EOF

###########################################
## Mise en place des filters spécifiques ##
## - Mod_evasive.conf                    ##
## - htdigest.conf                       ##
## - 
## - 
###########################################

######################
## MOD-EVASIVE.CONF ##
######################

if (test -f $DIR_FILTER/mod-evasive.conf)
then
        mv $DIR_FILTER/mod-evasive.conf $DIR_FILTER/mod-evasive.conf.old
fi

cat << EOF > $DIR_FILTER/mod-evasive.conf
# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
# $Revision$
#

[Definition]

# Option:  failregex
# Notes.:  regex to match the password failure 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>[\w\-.^_]+)
# Values:  TEXT
#
failregex = [[]client <HOST>[]] client denied by server configuration

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex = 
EOF

###################
## HTDIGEST.CONF ##
###################

if ( test -f $DIR_FILTER/htdigest.conf)
then
        mv $DIR_FILTER/htdigest.conf $DIR_FILTER/htdigest.conf.old
fi

cat << EOF > $DIR_FILTER/htdigest.conf
# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
# $Revision$
#

[Definition]

# Option:  failregex
# Notes.:  regex to match the password failure 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>[\w\-.^_]+)
# Values:  TEXT
#
failregex = [[]error[]] [[]client <HOST>[]] Digest:

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex = 
EOF

####################
## INTERCEPT.CONF ##
####################

if ( test -f $DIR_FILTER/intercept.conf)
then
        mv $DIR_FILTER/intercept.conf $DIR_FILTER/intercept.conf.old
fi

cat << EOF > $DIR_FILTER/intercept.conf

# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
# $Revision$
#

[Definition]

# Option:  failregex
# Notes.:  regex to match the password failure 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>[\w\-.^_]+)
# Values:  TEXT
#
failregex = <HOST> TLSv1 DHE-RSA-AES256-SHA ["]GET \/intercept\.php\?res=failed[&]reason=reject

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex = 
EOF

#######################
## MOT_DE_PASSE.CONF ##
#######################

if ( test -f $DIR_FILTER/mot_de_passe.conf )
then
        mv $DIR_FILTER/mot_de_passe.conf $DIR_FILTER/mot_de_passe.conf.old
fi

cat << EOF > $DIR_FILTER/mot_de_passe.conf

# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
# $Revision$
#

[Definition]

# Option:  failregex
# Notes.:  regex to match the password failure 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>[\w\-.^_]+)
# Values:  TEXT
#
failregex = <HOST> TLSv1 DHE-RSA-AES256-SHA ["]POST \/pass\/index\.php HTTP

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex = 
EOF


##############################################
## Log sur Iptables quand iptables-allports ##
##############################################

if ( test -f $ACTION_ALLPORTS )
then
        mv $ACTION_ALLPORTS $ACTION_ALLPORTS.old
fi

cat << EOF > $ACTION_ALLPORTS

# Fail2Ban configuration file
#
# Author: Cyril Jaquier
# Modified: Yaroslav O. Halchenko <debian@onerussian.com>
#                       made active on all ports from original iptables.conf
#
# $Revision$
#

[Definition]

# Option:  actionstart
# Notes.:  command executed once at the start of Fail2Ban.
# Values:  CMD
#
actionstart = iptables -N fail2ban-<name>
              iptables -A fail2ban-<name> -j RETURN
              iptables -I <chain> -p <protocol> -j fail2ban-<name>

# Option:  actionstop
# Notes.:  command executed once at the end of Fail2Ban
# Values:  CMD
#
actionstop = iptables -D <chain> -p <protocol> -j fail2ban-<name>
             iptables -F fail2ban-<name>
             iptables -X fail2ban-<name>

# Option:  actioncheck
# Notes.:  command executed once before each actionban command
# Values:  CMD
#
actioncheck = iptables -n -L <chain> | grep -q fail2ban-<name>

# Option:  actionban
# Notes.:  command executed when banning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    <ip>  IP address
#          <failures>  number of failures
#          <time>  unix timestamp of the ban time
# Values:  CMD

actionban = iptables -I fail2ban-<name> 1 -s <ip> -j ULOG --ulog-prefix "Fail2Ban -- DROP"
            iptables -I fail2ban-<name> 1 -s <ip> -j DROP

# Option:  actionunban
# Notes.:  command executed when unbanning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    <ip>  IP address
#          <failures>  number of failures
#          <time>  unix timestamp of the ban time
# Values:  CMD
#
actionunban = iptables -D fail2ban-<name> -s <ip> -j DROP
              iptables -D fail2ban-<name> -s <ip> -j ULOG --ulog-prefix "Fail2Ban -- DROP"

[Init]

# Defaut name of the chain
#
name = default

# Option:  protocol
# Notes.:  internally used by config reader for interpolations.
# Values:  [ tcp | udp | icmp | all ] Default: tcp
#
protocol = tcp

# Option:  chain
# Notes    specifies the iptables chain to which the fail2ban rules should be
#          added
# Values:  STRING  Default: INPUT
chain = INPUT

EOF