fail2ban/config/fail2ban.conf.default

# Fail2Ban configuration file
#
# $Revision: 1.8.2.13 $
#
# 2005.06.21  modified for readability  Iain Lea  iain@bricbrac.de

[DEFAULT]
# Option:  background
# Notes.:  start fail2ban as a daemon. Output is redirect to logfile.
# Values:  [true | false]  Default:  false
#
background = true

# Option:  verbose
# Notes.:  verbosity of the output.
#           0 - regular level
#           1 - INFO level
#           2 - DEBUG level (but commands get executed as opposed to
#                debug option)
# Values:  NUM  Default:  0
#
verbose = 1

# Option:  debug
# Notes.:  enable debug mode. No real commands gets executed but only
#          reported, more verbose output, bypass root user test.
# Values:  [true | false]  Default:  false
#
debug = false

# Option:  logtargets
# Notes.:  log targets. Space separated list of logging targets.
# Values:  STDERR SYSLOG file  Default:  /var/log/fail2ban.log
#
logtargets = /var/log/fail2ban.log

# Option:  syslog-target
# Notes.:  where to find syslog facility if logtarget SYSLOG.
# Values:  SOCKET HOST HOST:PORT  Default: /dev/log
#
syslog-target = /dev/log

# Option:  syslog-facility
# Notes.:  which syslog facility to use if logtarget SYSLOG.
# Values:  NUM  Default: 1
#
syslog-facility = 1

# Option:  pidlock
# Notes.:  path of the PID lock file (must be able to write to file).
# Values:  FILE  Default:  /var/run/fail2ban.pid
#
pidlock = /var/run/fail2ban.pid

# Option:  maxfailures
# Notes.:  number of failures before IP gets banned.
# Values:  NUM  Default:  5
#
maxfailures = 5

# Option:  bantime
# Notes.:  number of seconds an IP will be banned.
# Values:  NUM  Default:  600
#
bantime = 600

# Option:  findtime
# Notes.:  lifetime in seconds of a "failed" log entry.
# Values:  NUM  Default:  600
#
findtime = 600

# Option:  ignoreip
# Notes.:  space separated list of IP's to be ignored by fail2ban.
#          You can use CIDR mask in order to specify a range.
#          Example:  ignoreip = 192.168.0.1/24 123.45.235.65
# Values:  IP  Default:  192.168.0.0/16
#
ignoreip = 192.168.0.0/16


# Option:  cmdstart
# Notes.:  command executed once at the start of Fail2Ban
# Values:  CMD  Default:
#
cmdstart = 

# Option:  cmdend
# Notes.:  command executed once at the end of Fail2Ban.
# Values:  CMD  Default:
#
cmdend = 

# Option:  polltime
# Notes.:  number of seconds fail2ban sleeps between iterations.
# Values:  NUM  Default:  1
#
polltime = 1

# Option:  reinittime
# Notes.:  minimal number of seconds between the re-initialization of
#          firewalls due to external changes in their rules (see fwcheck)
# Values:  NUM  Default:  100
#
reinittime = 10

# Option:  maxreinits
# Notes.:  maximal number of re-initialization of firewalls due to external
#          changes. -1 stays for infinite, so only reinittime is of importance
# Values:  NUM  Default:  -1
#
maxreinits = -1


[MAIL]
# Option:  enabled
# Notes.:  enable mail notification when banning an IP address.
# Values:  [true | false]  Default:  false
#
enabled = false

# Option:  host
# Notes.:  host running the mail server.
# Values:  STR  Default:  localhost
#
host = localhost

# Option:  port
# Notes.:  port of the mail server.
# Values:  INT  Default:  25
#
port = 25

# Option:  from
# Notes.:  e-mail address of the sender.
# Values:  MAIL  Default:  fail2ban
#
from = fail2ban@localhost

# Option:  to
# Notes.:  e-mail addresses of the receiver. Addresses are space
#          separated.
# Values:  MAIL  Default:  root
#
to = root@localhost

# Option:  subject
# Notes.:  subject of the e-mail.
# Tags:    <section> active section (eg ssh, apache, etc)
#          <ip>  IP address
#          <failures>  number of failures
#          <failtime>  unix timestamp of the last failure
# Values:  TEXT  Default:  [Fail2Ban:<section>] Banned <ip>
#
subject = [Fail2Ban:<section>] Banned <ip>

# Option:  message
# Notes.:  message of the e-mail.
# Tags:    <section> active section (eg ssh, apache, etc)
#          <ip>  IP address
#          <failures>  number of failures
#          <failtime>  unix timestamp of the last failure
#          <br>  new line
# Values:  TEXT  Default:
#
message = Hi,<br>
          The IP <ip> has just been banned by Fail2Ban after
          <failures> attempts.<br>
          Regards,<br>
          Fail2Ban

# You can define a new section for each log file to check for
# password failure. Each section has to define the following
# options: logfile, fwban, fwunban, timeregex, timepattern,
# failregex.

[Apache]
# Option:  enabled
# Notes.:  enable monitoring for this section.
# Values:  [true | false]  Default:  false
#
enabled = false

# Option:  logfile
# Notes.:  logfile to monitor.
# Values:  FILE  Default:  /var/log/apache/access.log
#
logfile = /var/log/apache/access.log

# Option:  fwstart
# Notes.:  command executed once at the start of Fail2Ban
# Values:  CMD  Default:
#
fwstart = iptables -N fail2ban-http
          iptables -I INPUT -p tcp --dport http -j fail2ban-http
          iptables -A fail2ban-http -j RETURN

# Option:  fwend
# Notes.:  command executed once at the end of Fail2Ban
# Values:  CMD  Default:
#
fwend = iptables -D INPUT -p tcp --dport http -j fail2ban-http
        iptables -F fail2ban-http
        iptables -X fail2ban-http

# Option:  fwcheck
# Notes.:  command executed once before each fwban command
# Values:  CMD  Default:
#
fwcheck = iptables -L INPUT | grep -q fail2ban-http

# Option:  fwban
# 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
#          <failtime>  unix timestamp of the last failure
#          <bantime>  unix timestamp of the ban time
# Values:  CMD
# Default: iptables -I INPUT 1 -s <ip> -j DROP
#
fwban = iptables -I fail2ban-http 1 -s <ip> -j DROP

# Option:  fwunban
# Notes.:  command executed when unbanning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    <ip>  IP address
#          <bantime>  unix timestamp of the ban time
#          <unbantime>  unix timestamp of the unban time
# Values:  CMD
# Default: iptables -D INPUT -s <ip> -j DROP
#
fwunban = iptables -D fail2ban-http -s <ip> -j DROP

# Option:  timeregex
# Notes.:  regex to match timestamp in Apache logfile.
# Values:  [Wed Jan 05 15:08:01 2005]
# Default: \S{3} \S{3} \d{2} \d{2}:\d{2}:\d{2} \d{4}
#
timeregex = \S{3} \S{3} \d{2} \d{2}:\d{2}:\d{2} \d{4}

# Option:  timepattern
# Notes.:  format used in "timeregex" fields definition. Note that '%' must be
#          escaped with '%' (see http://rgruet.free.fr/PQR2.3.html#timeModule)
# Values:  TEXT  Default:  %%a %%b %%d %%H:%%M:%%S %%Y
#
timepattern = %%a %%b %%d %%H:%%M:%%S %%Y

# Option:  failregex
# Notes.:  regex to match the password failure messages in the logfile.
# Values:  TEXT  Default:  [[]client (?P<host>\S*)[]] user .*(?:: authentication failure|not found)
#
failregex = [[]client (?P<host>\S*)[]] user .*(?:: authentication failure|not found)

[SSH]
# Option:  enabled
# Notes.:  enable monitoring for this section.
# Values:  [true | false]  Default:  true
#
enabled = true

# Option:  logfile
# Notes.:  logfile to monitor.
# Values:  FILE  Default:  /var/log/auth.log
#
logfile = /var/log/auth.log

# Option:  fwstart
# Notes.:  command executed once at the start of Fail2Ban
# Values:  CMD  Default:
#
fwstart = iptables -N fail2ban-ssh
          iptables -I INPUT -p tcp --dport ssh -j fail2ban-ssh
          iptables -A fail2ban-ssh -j RETURN

# Option:  fwend
# Notes.:  command executed once at the end of Fail2Ban
# Values:  CMD  Default:
#
fwend = iptables -D INPUT -p tcp --dport ssh -j fail2ban-ssh
        iptables -F fail2ban-ssh
        iptables -X fail2ban-ssh

# Option:  fwcheck
# Notes.:  command executed once before each fwban command
# Values:  CMD  Default:
#
fwcheck = iptables -L INPUT | grep -q fail2ban-ssh

# Option:  fwbanrule
# 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
#          <failtime>  unix timestamp of the last failure
#          <bantime>  unix timestamp of the ban time
# Values:  CMD
# Default: iptables -I INPUT 1 -s <ip> -j DROP
#
fwban = iptables -I fail2ban-ssh 1 -s <ip> -j DROP

# Option:  fwunbanrule
# Notes.:  command executed when unbanning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    <ip>  IP address
#          <bantime>  unix timestamp of the ban time
#          <unbantime>  unix timestamp of the unban time
# Values:  CMD
# Default: iptables -D INPUT -s <ip> -j DROP
#
fwunban = iptables -D fail2ban-ssh -s <ip> -j DROP

# Option:  timeregex
# Notes.:  regex to match timestamp in SSH logfile.
# Values:  [Mar  7 17:53:28]
# Default: \S{3}\s{1,2}\d{1,2} \d{2}:\d{2}:\d{2}
#
timeregex = \S{3}\s{1,2}\d{1,2} \d{2}:\d{2}:\d{2}

# Option:  timepattern
# Notes.:  format used in "timeregex" fields definition. Note that '%' must be
#          escaped with '%' (see http://rgruet.free.fr/PQR2.3.html#timeModule)
# Values:  TEXT  Default:  %%b %%d %%H:%%M:%%S
#
timepattern = %%b %%d %%H:%%M:%%S

# Option:  failregex
# Notes.:  regex to match the password failures messages in the logfile.
# Values:  TEXT  Default:  (?:Authentication failure|Failed (?:keyboard-interactive/pam|password)) for(?: illegal user)? .* from (?:::f{4,6}:)?(?P<host>\S*)
#
failregex = : (?:(?:Authentication failure|Failed [-/\w+]+) for(?: [iI](?:llegal|nvalid) user)?|[Ii](?:llegal|nvalid) user) .* from (?:::f{4,6}:)?(?P<host>\S*)