On 10/1/2019 4:09 AM, Christopher Morrow wrote:
possible that this is various AWS customers making iptables/firewall mistakes?
   "block that pesky rfc1918 172/12 space!!"

AWS also uses some 172/12 space on their internal network (e.g. the network that sits between EC2 instances and the AWS external firewalls)

-Jim P.

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