One Hat Cyber Team

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Dir : ~/usr/share/doc/fail2ban/dist-config/action.d/
View File Name : nsupdate.conf

# Fail2Ban configuration file
#
# Author: Andrew St. Jean
#
# Use nsupdate to perform dynamic DNS updates on a BIND zone file.
# One may want to do this to update a local RBL with banned IP addresses.
#
# Options
#
# domain	DNS domain that will appear in nsupdate add and delete
#		commands.
#
# ttl		The time to live (TTL) in seconds of the TXT resource
#		record.
#
# rdata		Data portion of the TXT resource record.
#
# nsupdatecmd	Full path to the nsupdate command.
#
# keyfile	Full path to TSIG key file used for authentication between
#		nsupdate and BIND.
#
# Create an nsupdate.local to set at least the <domain> and <keyfile>
# options as they don't have default values.
#
# The ban and unban commands assume nsupdate will authenticate to the BIND
# server using a TSIG key. The full path to the key file must be specified
# in the <keyfile> parameter. Use this command to generate your TSIG key.
#
# dnssec-keygen -a HMAC-MD5 -b 256 -n HOST <key_name>
#
# Replace <key_name> with some meaningful name.
#
# This command will generate two files. Specify the .private file in the
# <keyfile> option. Note that the .key file must also be present in the same
# directory for nsupdate to use the key.
#
# Don't forget to add the key and appropriate allow-update or update-policy
# option to your named.conf file.
#

[Definition]

# Option:  actionstart
# Notes.:  command executed on demand at the first ban (or at the start of Fail2Ban if actionstart_on_demand is set to false).
# Values:  CMD
#
actionstart =


# Option:  actionstop
# Notes.:  command executed at the stop of jail (or at the end of Fail2Ban)
# Values:  CMD
#
actionstop =


# Option:  actioncheck
# Notes.:  command executed once before each actionban command
# Values:  CMD
#
actioncheck =

# Option:  actionban
# Notes.:  command executed when banning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    See jail.conf(5) man page
# Values:  CMD
#
actionban = echo <ip> | awk -F. '{print "prereq nxrrset "$4"."$3"."$2"."$1".<domain> TXT"; print "update add "$4"."$3"."$2"."$1".<domain> <ttl> IN TXT \"<rdata>\""; print "send"}' | <nsupdatecmd> -k <keyfile>

# Option:  actionunban
# Notes.:  command executed when unbanning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    See jail.conf(5) man page
# Values:  CMD
#
actionunban = echo <ip> | awk -F. '{print "update delete "$4"."$3"."$2"."$1".<domain>"; print "send"}' | <nsupdatecmd> -k <keyfile>

[Init]

# Option:  domain
# Notes.:  DNS domain that nsupdate will update.
# Values:  STRING
#
domain = 

# Option:  ttl
# Notes.:  time to live (TTL) in seconds of TXT resource record
#          added by nsupdate.
# Values:  NUM
#
ttl = 60

# Option:  rdata
# Notes.:  data portion of the TXT resource record added by nsupdate.
# Values:  STRING
#
rdata = Your IP has been banned

# Option:  nsupdatecmd
# Notes.:  specifies the full path to the nsupdate program that dynamically
#          updates BIND zone files.
# Values:  CMD
#
nsupdatecmd = /usr/bin/nsupdate

# Option:  keyfile
# Notes.:  specifies the full path to the file containing the
#	   TSIG key for communicating with BIND.
# Values:  STRING
#
keyfile =