Maybe try Fail2Ban on your server? -----Original Message----- From: CentOS <centos-bounces at centos.org> On Behalf Of Robert Moskowitz Sent: Tuesday, August 2, 2022 2:03 PM To: CentOS mailing list <centos at centos.org> Subject: [External] [CentOS] BIND server getting DDOS I just, maybe, figured out why I have been having problems with my CentOS DNS server with BIND 9.11.4. Aug 2 15:47:19 onlo named[6155]: client @0xaa3cad80 114.29.194.4#11205 (.): view external: query (cache) './A/IN' denied Aug 2 15:47:19 onlo named[6155]: client @0xaa3cad80 114.29.216.196#64956 (.): view external: query (cache) './A/IN' denied Aug 2 15:47:19 onlo named[6155]: client @0xaa3cad80 64.68.114.141#39466 (.): view external: query (cache) './A/IN' denied Aug 2 15:47:19 onlo named[6155]: client @0xaa3cad80 209.197.198.45#13280 (.): view external: query (cache) './A/IN' denied Aug 2 15:47:19 onlo named[6155]: client @0xaa3cad80 114.29.202.117#41955 (.): view external: query (cache) './A/IN' denied Aug 2 15:47:19 onlo named[6155]: client @0xaa3cad80 62.109.204.22#4406 (.): view external: query (cache) './A/IN' denied Aug 2 15:47:49 onlo named[6155]: client @0xa9420720 64.68.104.9#38518 (.): view external: query (cache) './A/IN' denied Aug 2 15:47:50 onlo named[6155]: client @0xaa882dc8 114.29.202.117#9584 (.): view external: query (cache) './A/IN' denied grep -c denied messages 46038 And that is since Jul 31 3am. Anyone have recommendations on how to stop this? thanks _______________________________________________ CentOS mailing list CentOS at centos.org https://lists.centos.org/mailman/listinfo/centos