centos 7 DenyHosts 安装 防暴力破解ssh登陆

为了减少软件扫描ssh登陆 还是用这个比较好点  默认端口号22 也要改 登陆密码也不要使用 弱口令 123456 这样的

Description

DenyHosts is a python program that automatically blocks ssh attacks by adding entries to /etc/hosts.deny.

DenyHosts will also inform Linux administrators about offending hosts, attacked users and suspicious logins.

官网地址 http://denyhosts.sourceforge.net/

下载地址

http://sourceforge.net/projects/denyhosts/

http://jaist.dl.sourceforge.net/project/denyhosts/denyhosts/2.6/DenyHosts-2.6.tar.gz

[root@localhost src]# cd /usr/local/src

没有安装wget的请使用 yum -install -y wget 安装

下载DenyHosts

[root@localhost src]# wget http://jaist.dl.sourceforge.net/project/denyhosts/denyhosts/2.6/DenyHosts-2.6.tar.gz
--2015-03-28 15:39:28-- http://jaist.dl.sourceforge.net/project/denyhosts/denyhosts/2.6/DenyHosts-2.6.tar.gz
正在解析主机 jaist.dl.sourceforge.net (jaist.dl.sourceforge.net)... 150.65.7.130, 2001:df0:2ed:feed::feed
正在连接 jaist.dl.sourceforge.net (jaist.dl.sourceforge.net)|150.65.7.130|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：42667 (42K) [application/x-gzip]
正在保存至: “DenyHosts-2.6.tar.gz”

100%[======================================>] 42,667 42.4KB/s 用时 1.0s

2015-03-28 15:39:30 (42.4 KB/s) - 已保存 “DenyHosts-2.6.tar.gz” [42667/42667])

解压DenyHosts

[root@localhost src]# tar -zxvf DenyHosts-2.6.tar.gz -C /usr/local/bin
DenyHosts-2.6/
DenyHosts-2.6/PKG-INFO
DenyHosts-2.6/denyhosts.py
DenyHosts-2.6/denyhosts.cfg-dist
DenyHosts-2.6/setup.py
DenyHosts-2.6/DenyHosts/
DenyHosts-2.6/DenyHosts/prefs.py
DenyHosts-2.6/DenyHosts/report.py
DenyHosts-2.6/DenyHosts/lockfile.py
DenyHosts-2.6/DenyHosts/__init__.py
DenyHosts-2.6/DenyHosts/plugin.py
DenyHosts-2.6/DenyHosts/denyfileutil.py
DenyHosts-2.6/DenyHosts/deny_hosts.py
DenyHosts-2.6/DenyHosts/regex.py
DenyHosts-2.6/DenyHosts/sync.py
DenyHosts-2.6/DenyHosts/counter.py
DenyHosts-2.6/DenyHosts/old-daemon.py
DenyHosts-2.6/DenyHosts/util.py
DenyHosts-2.6/DenyHosts/daemon.py
DenyHosts-2.6/DenyHosts/python_version.py
DenyHosts-2.6/DenyHosts/allowedhosts.py
DenyHosts-2.6/DenyHosts/filetracker.py
DenyHosts-2.6/DenyHosts/loginattempt.py
DenyHosts-2.6/DenyHosts/restricted.py
DenyHosts-2.6/DenyHosts/purgecounter.py
DenyHosts-2.6/DenyHosts/version.py
DenyHosts-2.6/DenyHosts/constants.py
DenyHosts-2.6/CHANGELOG.txt
DenyHosts-2.6/LICENSE.txt
DenyHosts-2.6/daemon-control-dist
DenyHosts-2.6/plugins/
DenyHosts-2.6/plugins/README.contrib
DenyHosts-2.6/plugins/shorewall_allow.sh
DenyHosts-2.6/plugins/shorewall_deny.sh
DenyHosts-2.6/plugins/test_deny.py
DenyHosts-2.6/scripts/
DenyHosts-2.6/scripts/restricted_from_invalid.py
DenyHosts-2.6/scripts/restricted_from_passwd.py
DenyHosts-2.6/README.txt
DenyHosts-2.6/MANIFEST.in

[root@localhost src]# cd /usr/local/bin

进入解压文件夹

cd DenyHosts-2.6

确认python编译工具安装

yun install -y python  centos 7默认已经安装python-2.7.5

开始编译安装setup.py

python setup.py install

[root@localhost DenyHosts-2.6]# python setup.py install
running install
running build
running build_py
creating build
creating build/lib
creating build/lib/DenyHosts
copying DenyHosts/prefs.py -> build/lib/DenyHosts
copying DenyHosts/report.py -> build/lib/DenyHosts
copying DenyHosts/lockfile.py -> build/lib/DenyHosts
copying DenyHosts/__init__.py -> build/lib/DenyHosts
copying DenyHosts/plugin.py -> build/lib/DenyHosts
copying DenyHosts/denyfileutil.py -> build/lib/DenyHosts
copying DenyHosts/deny_hosts.py -> build/lib/DenyHosts
copying DenyHosts/regex.py -> build/lib/DenyHosts
copying DenyHosts/sync.py -> build/lib/DenyHosts
copying DenyHosts/counter.py -> build/lib/DenyHosts
copying DenyHosts/old-daemon.py -> build/lib/DenyHosts
copying DenyHosts/util.py -> build/lib/DenyHosts
copying DenyHosts/daemon.py -> build/lib/DenyHosts
copying DenyHosts/python_version.py -> build/lib/DenyHosts
copying DenyHosts/allowedhosts.py -> build/lib/DenyHosts
copying DenyHosts/filetracker.py -> build/lib/DenyHosts
copying DenyHosts/loginattempt.py -> build/lib/DenyHosts
copying DenyHosts/restricted.py -> build/lib/DenyHosts
copying DenyHosts/purgecounter.py -> build/lib/DenyHosts
copying DenyHosts/version.py -> build/lib/DenyHosts
copying DenyHosts/constants.py -> build/lib/DenyHosts
running build_scripts
creating build/scripts-2.7
copying and adjusting denyhosts.py -> build/scripts-2.7
changing mode of build/scripts-2.7/denyhosts.py from 644 to 755
running install_lib
creating /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/prefs.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/report.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/lockfile.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/__init__.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/plugin.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/denyfileutil.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/deny_hosts.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/regex.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/sync.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/counter.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/old-daemon.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/util.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/daemon.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/python_version.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/allowedhosts.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/filetracker.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/loginattempt.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/restricted.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/purgecounter.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/version.py -> /usr/lib/python2.7/site-packages/DenyHosts
copying build/lib/DenyHosts/constants.py -> /usr/lib/python2.7/site-packages/DenyHosts
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/prefs.py to prefs.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/report.py to report.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/lockfile.py to lockfile.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/__init__.py to __init__.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/plugin.py to plugin.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/denyfileutil.py to denyfileutil.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/deny_hosts.py to deny_hosts.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/regex.py to regex.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/sync.py to sync.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/counter.py to counter.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/old-daemon.py to old-daemon.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/util.py to util.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/daemon.py to daemon.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/python_version.py to python_version.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/allowedhosts.py to allowedhosts.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/filetracker.py to filetracker.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/loginattempt.py to loginattempt.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/restricted.py to restricted.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/purgecounter.py to purgecounter.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/version.py to version.pyc
byte-compiling /usr/lib/python2.7/site-packages/DenyHosts/constants.py to constants.pyc
running install_scripts
copying build/scripts-2.7/denyhosts.py -> /usr/bin
changing mode of /usr/bin/denyhosts.py to 755
running install_data
creating /usr/share/denyhosts
copying denyhosts.cfg-dist -> /usr/share/denyhosts
copying setup.py -> /usr/share/denyhosts
copying daemon-control-dist -> /usr/share/denyhosts
copying CHANGELOG.txt -> /usr/share/denyhosts
copying README.txt -> /usr/share/denyhosts
creating /usr/share/denyhosts/scripts
copying scripts/restricted_from_invalid.py -> /usr/share/denyhosts/scripts
copying scripts/restricted_from_passwd.py -> /usr/share/denyhosts/scripts
creating /usr/share/denyhosts/plugins
copying plugins/README.contrib -> /usr/share/denyhosts/plugins
copying plugins/shorewall_allow.sh -> /usr/share/denyhosts/plugins
copying plugins/shorewall_deny.sh -> /usr/share/denyhosts/plugins
copying plugins/test_deny.py -> /usr/share/denyhosts/plugins
copying LICENSE.txt -> /usr/share/denyhosts
running install_egg_info
Writing /usr/lib/python2.7/site-packages/DenyHosts-2.6-py2.7.egg-info
[root@localhost DenyHosts-2.6]#

编辑配置文件denyhosts.cfg

[root@localhost DenyHosts-2.6]# cd /usr/share/denyhosts/

[root@localhost denyhosts]# cp denyhosts.cfg-dist denyhosts.cfg

    [root@localhost denyhosts]# cp daemon-control-dist daemon-control

 vi denyhost.cfg

该配置文件结构比较简单，简要说明主要参数如下：
PURGE_DENY：当一个IP被阻止以后，过多长时间被自动解禁。可选如3m（三分钟）、5h（5小时）、2d（两天）、8w（8周）、1y（一年）；
PURGE_THRESHOLD：定义了某一IP最多被解封多少次。即某一IP由于暴力破解SSH密码被阻止/解封达到了PURGE_THRESHOLD次，则会被永久禁止；
BLOCK_SERVICE：需要阻止的服务名；
DENY_THRESHOLD_INVALID：某一无效用户名（不存在的用户）尝试多少次登录后被阻止；
DENY_THRESHOLD_VALID：某一有效用户名尝试多少次登陆后被阻止（比如账号正确但密码错误），root除外；
DENY_THRESHOLD_ROOT：root用户尝试登录多少次后被阻止；
HOSTNAME_LOOKUP：是否尝试解析源IP的域名；

[root@localhost denyhosts]# vi denyhost.cfg
       ############ THESE SETTINGS ARE REQUIRED ############

########################################################################
#
# SECURE_LOG: the log file that contains sshd logging info
# if you are not sure, grep "sshd:" /var/log/*
#
# The file to process can be overridden with the --file command line
# argument
#
# Redhat or Fedora Core:
SECURE_LOG = /var/log/secure
#
# Mandrake, FreeBSD or OpenBSD:
#SECURE_LOG = /var/log/auth.log
#
# SuSE:
#SECURE_LOG = /var/log/messages
#
# Mac OS X (v10.4 or greater -
#   also refer to:   http://www.denyhosts.net/faq.html#macos
#SECURE_LOG = /private/var/log/asl.log
#
# Mac OS X (v10.3 or earlier):
#SECURE_LOG=/private/var/log/system.log
#
########################################################################

########################################################################
#
# HOSTS_DENY: the file which contains restricted host access information
#
# Most operating systems:
HOSTS_DENY = /etc/hosts.deny
#
# Some BSD (FreeBSD) Unixes:
#HOSTS_DENY = /etc/hosts.allow
#
# Another possibility (also see the next option):
#HOSTS_DENY = /etc/hosts.evil
#######################################################################

########################################################################
#
# PURGE_DENY: removed HOSTS_DENY entries that are older than this time
#             when DenyHosts is invoked with the --purge flag
#
#      format is: i[dhwmy]
#      Where 'i' is an integer (eg. 7)
#            'm' = minutes
#            'h' = hours
#            'd' = days
#            'w' = weeks
#            'y' = years
#
# never purge:
PURGE_DENY = 100y
#
# purge entries older than 1 week
#PURGE_DENY = 1w
#
# purge entries older than 5 days
#PURGE_DENY = 5d
#######################################################################

#######################################################################
#
# PURGE_THRESHOLD: defines the maximum times a host will be purged.
# Once this value has been exceeded then this host will not be purged.
# Setting this parameter to 0 (the default) disables this feature.
#
# default: a denied host can be purged/re-added indefinitely
#PURGE_THRESHOLD = 0
#
# a denied host will be purged at most 2 times.
#PURGE_THRESHOLD = 2
#
#######################################################################

#######################################################################
#
# BLOCK_SERVICE: the service name that should be blocked in HOSTS_DENY
#
# man 5 hosts_access for details
#
# eg.   sshd: 127.0.0.1  # will block sshd logins from 127.0.0.1
#
# To block all services for the offending host:
#BLOCK_SERVICE = ALL
# To block only sshd:
BLOCK_SERVICE  = sshd
# To only record the offending host and nothing else (if using
# an auxilary file to list the hosts).  Refer to:
# http://denyhosts.sourceforge.net/faq.html#aux
#BLOCK_SERVICE =
#
#######################################################################

#######################################################################
#
# DENY_THRESHOLD_INVALID: block each host after the number of failed login
# attempts has exceeded this value.  This value applies to invalid
# user login attempts (eg. non-existent user accounts)
#
DENY_THRESHOLD_INVALID = 5
#
#######################################################################
#######################################################################
#
# DENY_THRESHOLD_VALID: block each host after the number of failed
# login attempts has exceeded this value.  This value applies to valid
# user login attempts (eg. user accounts that exist in /etc/passwd) except
# for the "root" user
#
DENY_THRESHOLD_VALID = 10
#
#######################################################################

#######################################################################
#
# DENY_THRESHOLD_ROOT: block each host after the number of failed
# login attempts has exceeded this value.  This value applies to
# "root" user login attempts only.
#
DENY_THRESHOLD_ROOT = 10
#
#######################################################################

#######################################################################
#
# DENY_THRESHOLD_RESTRICTED: block each host after the number of failed
# login attempts has exceeded this value.  This value applies to
# usernames that appear in the WORK_DIR/restricted-usernames file only.
#
DENY_THRESHOLD_RESTRICTED = 1
#
#######################################################################

#######################################################################
#
# WORK_DIR: the path that DenyHosts will use for writing data to
# (it will be created if it does not already exist).
#
# Note: it is recommended that you use an absolute pathname
# for this value (eg. /home/foo/denyhosts/data)
#
WORK_DIR = /usr/share/denyhosts/data
#
#######################################################################

#######################################################################
#
# SUSPICIOUS_LOGIN_REPORT_ALLOWED_HOSTS
#
# SUSPICIOUS_LOGIN_REPORT_ALLOWED_HOSTS=YES|NO
# If set to YES, if a suspicious login attempt results from an allowed-host
# then it is considered suspicious.  If this is NO, then suspicious logins
# from allowed-hosts will not be reported.  All suspicious logins from
# ip addresses that are not in allowed-hosts will always be reported.
#
SUSPICIOUS_LOGIN_REPORT_ALLOWED_HOSTS=YES
######################################################################

######################################################################
#
# HOSTNAME_LOOKUP
#
# HOSTNAME_LOOKUP=YES|NO
# If set to YES, for each IP address that is reported by Denyhosts,
# the corresponding hostname will be looked up and reported as well
# (if available).
#
HOSTNAME_LOOKUP=YES
#
######################################################################

######################################################################
#
# LOCK_FILE
#
# LOCK_FILE=/path/denyhosts
# If this file exists when DenyHosts is run, then DenyHosts will exit
# immediately.  Otherwise, this file will be created upon invocation
# and deleted upon exit.  This ensures that only one instance is
# running at a time.
#
# Redhat/Fedora:
LOCK_FILE = /var/lock/subsys/denyhosts
#
# Debian
#LOCK_FILE = /var/run/denyhosts.pid
#
# Misc
#LOCK_FILE = /tmp/denyhosts.lock
#
######################################################################

       ############ THESE SETTINGS ARE OPTIONAL ############

#######################################################################
#
# ADMIN_EMAIL: if you would like to receive emails regarding newly
# restricted hosts and suspicious logins, set this address to
# match your email address.  If you do not want to receive these reports
# leave this field blank (or run with the --noemail option)
#
# Multiple email addresses can be delimited by a comma, eg:
# ADMIN_EMAIL = foo@bar.com, bar@foo.com, etc@foobar.com
#
ADMIN_EMAIL =
#
#######################################################################

#######################################################################
#######################################################################
#
# SMTP_HOST and SMTP_PORT: if DenyHosts is configured to email
# reports (see ADMIN_EMAIL) then these settings specify the
# email server address (SMTP_HOST) and the server port (SMTP_PORT)
#
#
SMTP_HOST = localhost
SMTP_PORT = 25
#
#######################################################################

#######################################################################
#
# SMTP_USERNAME and SMTP_PASSWORD: set these parameters if your
# smtp email server requires authentication
#
#SMTP_USERNAME=foo
#SMTP_PASSWORD=bar
#
######################################################################

#######################################################################
#
# SMTP_FROM: you can specify the "From:" address in messages sent
# from DenyHosts when it reports thwarted abuse attempts
#
SMTP_FROM = DenyHosts <nobody@localhost>
#
#######################################################################

#######################################################################
#
# SMTP_SUBJECT: you can specify the "Subject:" of messages sent
# by DenyHosts when it reports thwarted abuse attempts
SMTP_SUBJECT = DenyHosts Report
#
######################################################################

######################################################################
#
# SMTP_DATE_FORMAT: specifies the format used for the "Date:" header
# when sending email messages.
#
# for possible values for this parameter refer to: man strftime
#
# the default:
#
#SMTP_DATE_FORMAT = %a, %d %b %Y %H:%M:%S %z
#
######################################################################

######################################################################
#
# SYSLOG_REPORT
#
# SYSLOG_REPORT=YES|NO
# If set to yes, when denied hosts are recorded the report data
# will be sent to syslog (syslog must be present on your system).
# The default is: NO
#
#SYSLOG_REPORT=NO
#
#SYSLOG_REPORT=YES
#
######################################################################

######################################################################
#
# ALLOWED_HOSTS_HOSTNAME_LOOKUP
#
# ALLOWED_HOSTS_HOSTNAME_LOOKUP=YES|NO
# If set to YES, for each entry in the WORK_DIR/allowed-hosts file,
# the hostname will be looked up.  If your versions of tcp_wrappers
# and sshd sometimes log hostnames in addition to ip addresses
# then you may wish to specify this option.
#
#ALLOWED_HOSTS_HOSTNAME_LOOKUP=NO
#
######################################################################

######################################################################
#
# AGE_RESET_VALID: Specifies the period of time between failed login
# attempts that, when exceeded will result in the failed count for
# this host to be reset to 0.  This value applies to login attempts
# to all valid users (those within /etc/passwd) with the
# exception of root.  If not defined, this count will never
# be reset.
#
# See the comments in the PURGE_DENY section (above)
# for details on specifying this value or for complete details
# refer to:  http://denyhosts.sourceforge.net/faq.html#timespec
#
AGE_RESET_VALID=5d
#
######################################################################

######################################################################
#
# AGE_RESET_ROOT: Specifies the period of time between failed login
# attempts that, when exceeded will result in the failed count for
# this host to be reset to 0.  This value applies to all login
# attempts to the "root" user account.  If not defined,
# this count will never be reset.
#
# See the comments in the PURGE_DENY section (above)
# for details on specifying this value or for complete details
# refer to:  http://denyhosts.sourceforge.net/faq.html#timespec
#
AGE_RESET_ROOT=25d
#
######################################################################

######################################################################
#
# AGE_RESET_RESTRICTED: Specifies the period of time between failed login
# attempts that, when exceeded will result in the failed count for
# this host to be reset to 0.  This value applies to all login
# attempts to entries found in the WORK_DIR/restricted-usernames file.
# If not defined, the count will never be reset.
#
# See the comments in the PURGE_DENY section (above)
# for details on specifying this value or for complete details
# refer to:  http://denyhosts.sourceforge.net/faq.html#timespec
#
AGE_RESET_RESTRICTED=25d
#
######################################################################

######################################################################
#
# AGE_RESET_INVALID: Specifies the period of time between failed login
# attempts that, when exceeded will result in the failed count for
# this host to be reset to 0.  This value applies to login attempts
# made to any invalid username (those that do not appear
# in /etc/passwd).  If not defined, count will never be reset.
#
# See the comments in the PURGE_DENY section (above)
# for details on specifying this value or for complete details
# refer to:  http://denyhosts.sourceforge.net/faq.html#timespec
#
AGE_RESET_INVALID=10d
#
######################################################################

######################################################################
#
# RESET_ON_SUCCESS: If this parameter is set to "yes" then the
# failed count for the respective ip address will be reset to 0
# if the login is successful.
#
# The default is RESET_ON_SUCCESS = no
#
#RESET_ON_SUCCESS = yes
#
#####################################################################

######################################################################
#
# PLUGIN_DENY: If set, this value should point to an executable
# program that will be invoked when a host is added to the
# HOSTS_DENY file.  This executable will be passed the host
# that will be added as it's only argument.
#
#PLUGIN_DENY=/usr/bin/true
#
######################################################################

######################################################################
#
# PLUGIN_PURGE: If set, this value should point to an executable
# program that will be invoked when a host is removed from the
# HOSTS_DENY file.  This executable will be passed the host
# that is to be purged as it's only argument.
#
#PLUGIN_PURGE=/usr/bin/true
#
######################################################################

######################################################################
#
# USERDEF_FAILED_ENTRY_REGEX: if set, this value should contain
# a regular expression that can be used to identify additional
# hackers for your particular ssh configuration.  This functionality
# extends the built-in regular expressions that DenyHosts uses.
# This parameter can be specified multiple times.
# See this faq entry for more details:
#    http://denyhosts.sf.net/faq.html#userdef_regex
#
#USERDEF_FAILED_ENTRY_REGEX=
#
#
######################################################################

   ######### THESE SETTINGS ARE SPECIFIC TO DAEMON MODE  ##########

#######################################################################
#
# DAEMON_LOG: when DenyHosts is run in daemon mode (--daemon flag)
# this is the logfile that DenyHosts uses to report it's status.
# To disable logging, leave blank.  (default is: /var/log/denyhosts)
#
DAEMON_LOG = /var/log/denyhosts
#
# disable logging:
#DAEMON_LOG =
#
######################################################################

#######################################################################
#
# DAEMON_LOG_TIME_FORMAT: when DenyHosts is run in daemon mode
# (--daemon flag) this specifies the timestamp format of
# the DAEMON_LOG messages (default is the ISO8061 format:
# ie. 2005-07-22 10:38:01,745)
#
# for possible values for this parameter refer to: man strftime
#
# Jan 1 13:05:59
#DAEMON_LOG_TIME_FORMAT = %b %d %H:%M:%S
#
# Jan 1 01:05:59
#DAEMON_LOG_TIME_FORMAT = %b %d %I:%M:%S
#
######################################################################

#######################################################################
#
# DAEMON_LOG_MESSAGE_FORMAT: when DenyHosts is run in daemon mode
# (--daemon flag) this specifies the message format of each logged
# entry.  By default the following format is used:
#
# %(asctime)s - %(name)-12s: %(levelname)-8s %(message)s
#
# Where the "%(asctime)s" portion is expanded to the format
# defined by DAEMON_LOG_TIME_FORMAT
#
# This string is passed to python's logging.Formatter contstuctor.
# For details on the possible format types please refer to:
# http://docs.python.org/lib/node357.html
#
# This is the default:
#DAEMON_LOG_MESSAGE_FORMAT = %(asctime)s - %(name)-12s: %(levelname)-8s %(message)s
#
#
######################################################################

#######################################################################
#
# DAEMON_SLEEP: when DenyHosts is run in daemon mode (--daemon flag)
# this is the amount of time DenyHosts will sleep between polling
# the SECURE_LOG.  See the comments in the PURGE_DENY section (above)
# for details on specifying this value or for complete details
# refer to:    http://denyhosts.sourceforge.net/faq.html#timespec
#
#
DAEMON_SLEEP = 30s
#
#######################################################################

#######################################################################
#
# DAEMON_PURGE: How often should DenyHosts, when run in daemon mode,
# run the purge mechanism to expire old entries in HOSTS_DENY
# This has no effect if PURGE_DENY is blank.
#
DAEMON_PURGE = 1h
#
#######################################################################

   #########   THESE SETTINGS ARE SPECIFIC TO     ##########
   #########       DAEMON SYNCHRONIZATION         ##########

#######################################################################
#
# Synchronization mode allows the DenyHosts daemon the ability
# to periodically send and receive denied host data such that
# DenyHosts daemons worldwide can automatically inform one
# another regarding banned hosts.   This mode is disabled by
# default, you must uncomment SYNC_SERVER to enable this mode.
#
# for more information, please refer to:
#        http:/denyhosts.sourceforge.net/faq.html#sync
#
#######################################################################

#######################################################################
#
# SYNC_SERVER: The central server that communicates with DenyHost
# daemons.  Currently, denyhosts.net is the only available server
# however, in the future, it may be possible for organizations to
# install their own server for internal network synchronization
#
# To disable synchronization (the default), do nothing.
#
# To enable synchronization, you must uncomment the following line:
#SYNC_SERVER = http://xmlrpc.denyhosts.net:9911
#
#######################################################################

#######################################################################
#
# SYNC_INTERVAL: the interval of time to perform synchronizations if
# SYNC_SERVER has been uncommented.  The default is 1 hour.
#
#SYNC_INTERVAL = 1h
#
#######################################################################

#######################################################################
#
# SYNC_UPLOAD: allow your DenyHosts daemon to transmit hosts that have
# been denied?  This option only applies if SYNC_SERVER has
# been uncommented.
# The default is SYNC_UPLOAD = yes
#
#SYNC_UPLOAD = no
#SYNC_UPLOAD = yes
#
#######################################################################

#######################################################################
#
# SYNC_DOWNLOAD: allow your DenyHosts daemon to receive hosts that have
# been denied by others?  This option only applies if SYNC_SERVER has
# been uncommented.
# The default is SYNC_DOWNLOAD = yes
#
#SYNC_DOWNLOAD = no
#SYNC_DOWNLOAD = yes
#
#
#
#######################################################################

#######################################################################
#
# SYNC_DOWNLOAD_THRESHOLD: If SYNC_DOWNLOAD is enabled this parameter
# filters the returned hosts to those that have been blocked this many
# times by others.  That is, if set to 1, then if a single DenyHosts
# server has denied an ip address then you will receive the denied host.
#
# See also SYNC_DOWNLOAD_RESILIENCY
#
#SYNC_DOWNLOAD_THRESHOLD = 10
#
# The default is SYNC_DOWNLOAD_THRESHOLD = 3
#
#SYNC_DOWNLOAD_THRESHOLD = 3
#
#######################################################################

#######################################################################
#
# SYNC_DOWNLOAD_RESILIENCY:  If SYNC_DOWNLOAD is enabled then the
# value specified for this option limits the downloaded data
# to this resiliency period or greater.
#
# Resiliency is defined as the timespan between a hackers first known
# attack and it's most recent attack.  Example:
#
# If the centralized   denyhosts.net server records an attack at 2 PM
# and then again at 5 PM, specifying a SYNC_DOWNLOAD_RESILIENCY = 4h
# will not download this ip address.
#
# However, if the attacker is recorded again at 6:15 PM then the
# ip address will be downloaded by your DenyHosts instance.
#
# This value is used in conjunction with the SYNC_DOWNLOAD_THRESHOLD
# and only hosts that satisfy both values will be downloaded.
# This value has no effect if SYNC_DOWNLOAD_THRESHOLD = 1
#
# The default is SYNC_DOWNLOAD_RESILIENCY = 5h (5 hours)
#
# Only obtain hackers that have been at it for 2 days or more:
#SYNC_DOWNLOAD_RESILIENCY = 2d
# Only obtain hackers that have been at it for 5 hours or more:
#SYNC_DOWNLOAD_RESILIENCY = 5h
#
#######################################################################

启动DenyHosts和添加自启动

目录 /usr/share/denyhosts

./daemon-control start 

添加自启动服务

[root@localhost denyhosts]# cd /etc/init.d
[root@localhost init.d]# ls
functions  iprdump  iprinit  iprupdate  netconsole  network  README
[root@localhost init.d]# ln -s /usr/share/denyhosts/daemon-control denyhosts
[root@localhost init.d]# ls
denyhosts  functions  iprdump  iprinit  iprupdate  netconsole  network  README
[root@localhost init.d]# chkconfig --add denyhosts
[root@localhost init.d]# chkconfig denyhosts on
[root@localhost init.d]# chkconfig --list denyhosts

注意：该输出结果只显示 SysV 服务，并不包含原生 systemd 服务。SysV 配置数据可能被原生 systemd 配置覆盖。
      如果您想列出 systemd 服务,请执行 'systemctl list-unit-files'。
      欲查看对特定 target 启用的服务请执行
      'systemctl list-dependencies [target]'。

denyhosts       0:关    1:关    2:开    3:开    4:开    5:开    6:关

　　

这样就完成了