On Tue, Oct 01, 2019 at 04:50:33AM -0400, Jim Popovitch via NANOG wrote: > 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)
Does AWS use 172.0.0.0/12 internally, or 172.16.0.0/12? They're different things, after all. - Matt
