IP차단을 자동으로 하는법

input_userauth_request: illegal user gopinath
Failed password for illegal user gopinath from 210.100.248.131 port 58995 ssh2
Received disconnect from 210.100.248.131: 11: Bye Bye
input_userauth_request: illegal user gordan
Failed password for illegal user gordan from 210.100.248.131 port 59147 ssh2
Received disconnect from 210.100.248.131: 11: Bye Bye
input_userauth_request: illegal user gordon
Failed password for illegal user gordon from 210.100.248.131 port 59307 ssh2
Received disconnect from 210.100.248.131: 11: Bye Bye
input_userauth_request: illegal user gorgeous
Failed password for illegal user gorgeous from 210.100.248.131 port 59467 ssh2
Received disconnect from 210.100.248.131: 11: Bye Bye
input_userauth_request: illegal user gorges
Failed password for illegal user gorges from 210.100.248.131 port 59622 ssh2
Received disconnect from 210.100.248.131: 11: Bye Bye

매일 이런 접속로그들이 쌓이고 있습니다.

그날그날 이런 아이피들에 대해 iptables로 차단하고 있는데요.

양이 많은지라 매일 이작업을 해주는것도 노가다네요.

자동으로 하는 방법은 없을까요?