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將fail2ban加入Linux DNS Bind 來抵禦DoS

早上發現DNS流量有些異常,查了query.log日誌如下:

9-Apr-2014 13:49:33.418 queries: info: client 168.19.213.88#25345: view other_user: query: isc.org IN ANY +ED (173.60.126.74)

09-Apr-2014 13:49:33.475 queries: info: client 168.19.213.88#25345: view other_user: query: isc.org IN ANY +ED (173.60.126.74) 09-Apr-2014 13:49:33.487 queries: info: client 168.19.213.88#25345: view other_user: query: isc.org IN ANY +ED (173.60.126.74) 09-Apr-2014 13:49:33.516 queries: info: client 70.39.93.72#49940: view other_user: query: isc.org IN ANY […]