安装denyhost防止SSH和FTP被暴力破解(2)

# 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
#
#######################################################################

最后就是设置启动脚本了

cp /usr/share/denyhosts/daemon-control-dist /usr/share/denyhosts/daemon-control
chown root /usr/share/denyhosts/daemon-control
chmod 755 /usr/share/denyhosts/daemon-control
ln -s /usr/share/denyhosts/daemon-control /etc/init.d/denyhosts
chkconfig --level 345 denyhosts on

启动denyhosts

service denyhosts start

这样就安装完成了,每次开机都自动启动的,自己测试下,输入几次错误的密码.然后看看cat /etc/hosts.deny 里面是否有屏蔽的IP,再然后测试下,有屏蔽IP是否还能登录SSH和FTP.我的FTP安装的是VSFTP,其他的没测试过..