使用fail2ban預防被挖洞的筆記

參考：http://www.javashuo.com/article/p-ahhqnbpg-eh.html

一、安裝fail2ban：

yum -y install epel-release

yum -y install fail2ban

二、配置fail2ban：

修改/etc/fail2ban/jail.conf

[default]
destemail = abc@def.com
sender = nginx-1@def.com
#這裏須要修改發送和接收郵件的郵箱

[nginx-get-404]
enabled = true
port = http,https
filter = nginx
action = iptables[name=nginx, port=http, protocol=tcp]
         %(mta)s-whois[name=%(__name__)s, sender="%(sender)s", dest="%(destemail)s", protocol="%(protocol)s", chain="%(chain)s"]
#這裏增長了郵件通知
logpath = /var/log/nginx/access.log
bantime = 3600
findtime = 60
maxretry = 5

增長/etc/fail2ban/filter.d/nginx.conf

[Definition]
failregex = <HOST> -.*- .*HTTP/1.* 404 .*$
ignoreregex = <HOST> -.*- .*GET /www/common/.*$
#ignoreregex是忽略的地址，防止因頁面代碼寫的很差引起的錯判，若是不須要能夠留空

修改/etc/postfix/mail.cf

主要是修改releyhost = 10.0.30.1

自己有內部郵件的smtp轉發服務器

三、檢查fail2ban規則

fail2ban-regex /var/log/nginx/access.log /etc/fail2ban/filter.d/nginx.conf /etc/fail2ban/filter.d/nginx.conf --print-all-match --print-all-ignore

注意：上面有2次用到/etc/fail2ban/filter.d/nginx.conf，是由於我配置了ignoreregex的內容

四、啓動fail2ban和postfix

service postfix restart
service fail2ban restart

五、檢查fail2ban

fail2ban-client status

fail2ban-client status ngixn-get-404

分別檢查的是fail2ban的總開關狀態，和其中nginx-get-404功能的掃描狀態