Denyhosts使用

转自:http://blog.chinaunix.net/uid-26167002-id-3026491.html

denyhostspython语言程序,借用tcp_wrapper程序来进行主机防护。作用:防止暴力破解服务器用户密码。

1.安装

# cd /usr/local

DenyHosts-2.6.tar.gz

# tar -zxvf DenyHosts-2.6.tar.gz
# cd DenyHosts-2.5
# python setup.py install

默认是安装到/usr/share/denyhosts目录

2.配置

# cd /usr/share/denyhosts/
# cp denyhosts.cfg-dist denyhosts.cfg
# vi denyhosts.cfg

相关参数解释:

       ############ THESE SETTINGS ARE REQUIRED ############

SECURE_LOG = /var/log/secure

HOSTS_DENY = /etc/hosts.deny

PURGE_DENY = 1w #过多久后清除已经禁止的,其中w代表周,d代表天,h代表小时,s代表秒,m代表分钟

BLOCK_SERVICE  = sshd

DENY_THRESHOLD_INVALID = 3 #允许无效用户失败的次数

DENY_THRESHOLD_VALID = 5 #允许普通用户登陆失败的次数

DENY_THRESHOLD_ROOT = 5 #允许root登陆失败的次数

DENY_THRESHOLD_RESTRICTED = 1

WORK_DIR = /usr/share/denyhosts/data

SUSPICIOUS_LOGIN_REPORT_ALLOWED_HOSTS=YES

HOSTNAME_LOOKUP=YES

LOCK_FILE = /var/lock/subsys/denyhosts

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

ADMIN_EMAIL = [email protected] #若有ip被禁用发邮件通知

SMTP_HOST = localhost

SMTP_PORT = 25

SMTP_FROM = DenyHosts <192.168.0.1@localhost>

SMTP_SUBJECT = DenyHosts Report

AGE_RESET_VALID=1d #有效用户登录失败计数归零的时间

AGE_RESET_ROOT=1d #root用户登录失败计数归零的时间

AGE_RESET_RESTRICTED=1d

AGE_RESET_INVALID=10d #无效用户登录失败计数归零的时间

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

DAEMON_LOG = /var/log/denyhosts

DAEMON_SLEEP = 30s

DAEMON_PURGE = 1h

登录[email protected]邮箱查看是否有IP被禁用。######################################################
设置启动脚本 
# cp daemon-control-dist daemon-control
# chown root daemon-control
# chmod 700 daemon-control
#./daemon-control start  
(启动)

#ln -s /usr/share/denyhosts/daemon-control /etc/init.d/denyhosts

#chkconfig --add denyhosts

#chkconfig --list denyhosts

#chkconfig denyhosts on

设置开机启动

# vi /etc/rc.local
添加/usr/share/denyhosts/daemon-control start

3.启动服务

service denyhosts start

4. denyhos使用

如果不想让主机拒绝某一个ip,做法如下:

vi /etc/hosts.allow   

sshd: 192.168.0.1  #允许192.168.0.1访问该主机的ssh服务

如果想拒绝某一个ip同样使用vi /etc/hosts.deny添加就Ok


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