denyhosts下载地址：

安装：

more README.txt

denyhosts.cfg配置文件实例：

SECURE_LOG = /var/log/secure

HOSTS_DENY = /etc/hosts.deny

PURGE_DENY =

BLOCK_SERVICE  = ALL

DENY_THRESHOLD_INVALID = 2

DENY_THRESHOLD_VALID = 3

DENY_THRESHOLD_ROOT = 5

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

ADMIN_EMAIL =

SMTP_HOST = localhost

SMTP_PORT = 25

SMTP_FROM = DenyHosts <>

SMTP_SUBJECT = DenyHosts Report

AGE_RESET_VALID=5d

AGE_RESET_ROOT=25d

AGE_RESET_RESTRICTED=25d

AGE_RESET_INVALID=10d

DAEMON_LOG = /var/log/denyhosts

DAEMON_SLEEP = 30s

DAEMON_PURGE = 1h