請服用 DenyHosts ~
FreeBSD 請用 ports 安裝： /usr/ports/security/denyhosts/
Linux 請到 http://denyhosts.sourceforge.net 下載安裝
官方安裝說明：
To run denyhosts from startup, add denyhosts_enable="YES" in your /etc/rc.conf.
Configiration options can be found in /usr/local/etc/denyhosts.conf
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In order to proper working of denyhosts
1. edit your /etc/hosts.allow file and add:
sshd : /etc/hosts.deniedssh : deny
sshd : ALL : allow
2. issue the following command if /etc/hosts.deniedssh does not exist yet
touch /etc/hosts.deniedssh
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/usr/local/etc/denyhosts.conf 基本設定完成後，/usr/local/etc/rc.d/denyhosts start 即可～
如需允許特定 IP 避免被鎖住，請在 DenyHosts WORK_DIR 目錄中新增一個 allow_hosts 每行一個IP，重啓 denyhosts 後即可排除特定 IP ~
