DenyHosts是Python语言写的一个程序，它会分析sshd的日志文件（/var/log/secure），当发现重 复的攻击时就会记录IP到/etc/hosts.deny文件，从而达到自动屏IP的功能
DenyHosts官方网站 http://denyhosts.sourceforge.net
下载页面 http://sourceforge.net/projects/denyhosts/files/
| 1 2 3 4 5 | tar -xzf DenyHosts-2.6.tar.gz cd DenyHosts-2.6 python setup.py install cd /usr/share/denyhosts/ #安装目录 cp denyhosts.cfg-dist denyhosts.cfg |
vim denyhosts.cfg
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | ############ THESE SETTINGS ARE REQUIRED ############ SECURE_LOG = /var/log/secure #系统的ssh日志，centos默认是这个文件 HOSTS_DENY = /etc/hosts.deny #被阻止ip的文档 PURGE_DENY = 2d #阻止时间 BLOCK_SERVICE = sshdDENY_THRESHOLD_INVALID = 5 #允许无效用户登录失败的次数 DENY_THRESHOLD_VALID = 10 #允许普通用户登录失败的次数 DENY_THRESHOLD_ROOT = 3 #允许root登录失败的次数 DENY_THRESHOLD_RESTRICTED = 3 #设定 deny host 写入到该资料夹 WORK_DIR = /usr/share/denyhosts/data #将deny的host或ip纪录到Work_dir中 SUSPICIOUS_LOGIN_REPORT_ALLOWED_HOSTS=YES HOSTNAME_LOOKUP=YES #是否做域名反解 LOCK_FILE = /var/lock/subsys/denyhosts ############ THESE SETTINGS ARE OPTIONAL ############ ADMIN_EMAIL = your_mail@163.comSMTP_HOST = localhostSMTP_PORT = 25SMTP_FROM = DenyHosts <nobody@localhost>SMTP_SUBJECT = DenyHosts ReportAGE_RESET_VALID=5dAGE_RESET_ROOT=25dAGE_RESET_RESTRICTED=25dAGE_RESET_INVALID=10d ######### THESE SETTINGS ARE SPECIFIC TO DAEMON MODE ########## DAEMON_LOG = /var/log/denyhosts #denyhosts自己的日志 DAEMON_SLEEP = 30sDAEMON_PURGE = 1h |
| 1 2 3 4 5 6 | cp daemon-control-dist daemon-control chown root daemon-control chmod 700 daemon-control ./daemon-control start ln -s /usr/share/denyhosts/daemon-control /etc/init.d/denyhosts chkconfig --level 2345 denyhosts on |
| 1 2 | #重启服务以及进程service denyhosts restart |
| 1 2 | sent DenyHosts SIGTERMstarting DenyHosts: /usr/bin/env python /usr/bin/denyhosts.py --daemon --config=/usr/share/denyhosts/denyhosts.cfg |
cat /etc/hosts.deny #查看阻止的ip 记录
如果取消这个ip的限制，则在/etc/hosts.deny 删除ip信息
本文转自 bbotte 51CTO博客，原文链接：http://blog.51cto.com/bbotte/1530831，如需转载请自行联系原作者
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