Fail2Ban -- Virtualmin/webmin - Debian BUSTER

#

# WARNING: heavily refactored in 0.9.0 release. Please review and

# customize settings for your setup.

#

# Changes: in most of the cases you should not modify this

# file, but provide customizations in jail.local file,

# or separate .conf files under jail.d/ directory, e.g.:

#

# HOW TO ACTIVATE JAILS:

#

# YOU SHOULD NOT MODIFY THIS FILE.

#

# It will probably be overwritten or improved in a distribution update.

#

# Provide customizations in a jail.local file or a jail.d/customisation.local.

# For example to change the default bantime for all jails and to enable the

# ssh-iptables jail the following (uncommented) would appear in the .local file.

# See man 5 jail.conf for details.

#

# [DEFAULT]

# bantime = 1h

#

# [sshd]

# enabled = true

#

# See jail.conf(5) man page for more information

# Comments: use '#' for comment lines and ';' (following a space) for inline comments

[INCLUDES]

#before = paths-distro.conf

before = paths-debian.conf

# The DEFAULT allows a global definition of the options. They can be overridden

# in each jail afterwards.

[DEFAULT]

#

# MISCELLANEOUS OPTIONS

#

# "ignorself" specifies whether the local resp. own IP addresses should be ignored

# (default is true). Fail2ban will not ban a host which matches such addresses.

#ignorself = true

# "ignoreip" can be a list of IP addresses, CIDR masks or DNS hosts. Fail2ban

# will not ban a host which matches an address in this list. Several addresses

# can be defined using space (and/or comma) separator.

#ignoreip = 127.0.0.1/8 ::1

# External command that will take an tagged arguments to ignore, e.g. <ip>,

# and return true if the IP is to be ignored. False otherwise.

#

# ignorecommand = /path/to/command <ip>

ignorecommand =

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

bantime = 604800

# A host is banned if it has generated "maxretry" during the last "findtime"

# seconds.

findtime = 302400

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

# "backend" specifies the backend used to get files modification.

# Available options are "pyinotify", "gamin", "polling", "systemd" and "auto".

# This option can be overridden in each jail as well.

#

# pyinotify: requires pyinotify (a file alteration monitor) to be installed.

# If pyinotify is not installed, Fail2ban will use auto.

# gamin: requires Gamin (a file alteration monitor) to be installed.

# If Gamin is not installed, Fail2ban will use auto.

# polling: uses a polling algorithm which does not require external libraries.

# systemd: uses systemd python library to access the systemd journal.

# Specifying "logpath" is not valid for this backend.

# See "journalmatch" in the jails associated filter config

# auto: will try to use the following backends, in order:

# pyinotify, gamin, polling.

#

# Note: if systemd backend is chosen as the default but you enable a jail

# for which logs are present only in its own log files, specify some other

# backend for that jail (e.g. polling) and provide empty value for

# journalmatch. See https://github.com/fail2ban/fail2…omment-74901200

backend = auto

# "usedns" specifies if jails should trust hostnames in logs,

# warn when DNS lookups are performed, or ignore all hostnames in logs

#

# yes: if a hostname is encountered, a DNS lookup will be performed.

# warn: if a hostname is encountered, a DNS lookup will be performed,

# but it will be logged as a warning.

# no: if a hostname is encountered, will not be used for banning,

# but it will be logged as info.

# raw: use raw value (no hostname), allow use it for no-host filters/actions (example user)

usedns = warn

# "logencoding" specifies the encoding of the log files handled by the jail

# This is used to decode the lines from the log file.

# Typical examples: "ascii", "utf-8"

#

# auto: will use the system locale setting

logencoding = auto

# "enabled" enables the jails.

# By default all jails are disabled, and it should stay this way.

# Enable only relevant to your setup jails in your .local or jail.d/*.conf

#

# true: jail will be enabled and log files will get monitored for changes

# false: jail is not enabled

enabled = false

# "mode" defines the mode of the filter (see corresponding filter implementation for more info).

mode = normal

# "filter" defines the filter to use by the jail.

# By default jails have names matching their filter name

#

filter = %(__name__)s[mode=%(mode)s]

#

# ACTIONS

#

# Some options used for actions

# Destination email address used solely for the interpolations in

# jail.{conf,local,d/*} configuration files.

destemail = noreply@playerx.de

# Sender email address used solely for some actions

sender = root@<fq-hostname>

# E-mail action. Since 0.8.1 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 = all

# Specify chain where jumps would need to be added in ban-actions expecting parameter chain

chain = <known/chain>

# Ports to be banned

# Usually should be overridden in a particular jail

port = 0:65535

# Format of user-agent https://tools.ietf.org/html/rfc7231#section-5.5.3

fail2ban_agent = Fail2Ban/%(fail2ban_version)s

#

# Action shortcuts. To be used to define action parameter

# Default banning action (e.g. iptables, iptables-new,

# iptables-multiport, shorewall, etc) It is used to define

# action_* variables. Can be overridden globally or per

# section within jail.local file

banaction = iptables

banaction_allports = iptables-allports

# The simplest action to take: ban only

action_ = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]

# ban & send an e-mail with whois report to the destemail.

action_mw = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]

%(mta)s-whois[name=%(__name__)s, sender="%(sender)s", dest="%(destemail)s", protocol="%(protocol)s", chain="%(chain)s"]

# ban & send an e-mail with whois report and relevant log lines

# to the destemail.

action_mwl = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]

%(mta)s-whois-lines[name=%(__name__)s, sender="%(sender)s", dest="%(destemail)s", logpath=%(logpath)s, chain="%(chain)s"]

# See the IMPORTANT note in action.d/xarf-login-attack for when to use this action

#

# ban & send a xarf e-mail to abuse contact of IP address and include relevant log lines

# to the destemail.

action_xarf = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]

xarf-login-attack[service=%(__name__)s, sender="%(sender)s", logpath=%(logpath)s, port="%(port)s"]

# ban IP on CloudFlare & send an e-mail with whois report and relevant log lines

# to the destemail.

action_cf_mwl = cloudflare[cfuser="%(cfemail)s", cftoken="%(cfapikey)s"]

%(mta)s-whois-lines[name=%(__name__)s, sender="%(sender)s", dest="%(destemail)s", logpath=%(logpath)s, chain="%(chain)s"]

# Report block via blocklist.de fail2ban reporting service API

#

# See the IMPORTANT note in action.d/blocklist_de.conf for when to use this action.

# Specify expected parameters in file action.d/blocklist_de.local or if the interpolation

# `action_blocklist_de` used for the action, set value of `blocklist_de_apikey`

# in your `jail.local` globally (section [DEFAULT]) or per specific jail section (resp. in

# corresponding jail.d/my-jail.local file).

#

action_blocklist_de = blocklist_de[email="%(sender)s", service=%(filter)s, apikey="%(blocklist_de_apikey)s", agent="%(fail2ban_agent)s"]

# Report ban via badips.com, and use as blacklist

#

# See BadIPsAction docstring in config/action.d/badips.py for

# documentation for this action.

#

# NOTE: This action relies on banaction being present on start and therefore

# should be last action defined for a jail.

#

action_badips = badips.py[category="%(__name__)s", banaction="%(banaction)s", agent="%(fail2ban_agent)s"]

#

# Report ban via badips.com (uses action.d/badips.conf for reporting only)

#

action_badips_report = badips[category="%(__name__)s", agent="%(fail2ban_agent)s"]

# Report ban via abuseipdb.com.

#

# See action.d/abuseipdb.conf for usage example and details.

#

action_abuseipdb = abuseipdb

# 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

#

#

# SSH servers

#

[sshd]

# To use more aggressive sshd modes set filter parameter "mode" in jail.local:

# normal (default), ddos, extra or aggressive (combines all).

# See "tests/files/logs/sshd" or "filter.d/sshd.conf" for usage example and details.

#mode = normal

port = ssh

logpath = %(sshd_log)s

backend = %(sshd_backend)s

[dropbear]

port = ssh

logpath = %(dropbear_log)s

backend = %(dropbear_backend)s

[selinux-ssh]

port = ssh

logpath = %(auditd_log)s

jail.conf

[sshd]

enabled = true

port = ssh,2233

bantime.increment = true

filter = sshd

[ssh-ddos]

enabled = false

port = ssh,sftp

filter = sshd-ddos

logpath = %(sshd_log)s

[webmin-auth]

enabled = true

port = 10000,10001

bantime.increment = true

bantime = 600

[proftpd]

enabled = true

port = ftp,ftp-data,ftps,ftps-data

bantime.increment = true

[postfix]

enabled = true

port = smtp,465,submission

bantime.increment = true

[dovecot]

enabled = true

port = pop3,pop3s,imap,imaps,submission,465,sieve

bantime.increment = true

bantime = 600

[postfix-sasl]

enabled = true

port = smtp,465,submission,imap,imaps,pop3,pop3s,smtps,imap2,imap3

maxretry = 2

bantime.increment = true