nanog mailing list archives
Re: AWS issues with 172.0.0.0/12
From: Javier J <javier () advancedmachines us>
Date: Thu, 3 Oct 2019 17:53:34 -0400
Auto generated VPC in AWS use RFC1819 addresses. This should not interfere with pub up space. What is the exact issue? If you can't ping something in AWS chances are it's a security group blocking you. On Tue, Oct 1, 2019, 7:00 PM Jim Popovitch via NANOG <nanog () nanog org> wrote:
On October 1, 2019 9:39:03 PM UTC, Matt Palmer <mpalmer () hezmatt org> wrote: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 makingiptables/firewall mistakes?"block that pesky rfc1918 172/12 space!!"AWS also uses some 172/12 space on their internal network (e.g. thenetworkthat 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.I don't know their entire operations, but they do use some 172.16.0.0/12 addresses internally. And yes, that is very different than 172/12, sorry for the confusion. -Jim P.
Current thread:
- Re: AWS issues with 172.0.0.0/12 Stephane Bortzmeyer (Oct 01)
- Re: AWS issues with 172.0.0.0/12 Christopher Morrow (Oct 01)
- Re: AWS issues with 172.0.0.0/12 Stephane Bortzmeyer (Oct 01)
- Re: AWS issues with 172.0.0.0/12 Jim Popovitch via NANOG (Oct 01)
- Re: AWS issues with 172.0.0.0/12 Matt Palmer (Oct 01)
- Re: AWS issues with 172.0.0.0/12 Jim Popovitch via NANOG (Oct 01)
- Re: AWS issues with 172.0.0.0/12 Javier J (Oct 03)
- Re: AWS issues with 172.0.0.0/12 Mehmet Akcin (Oct 07)
- Re: AWS issues with 172.0.0.0/12 Javier J (Oct 09)
- Re: AWS issues with 172.0.0.0/12 Mehmet Akcin (Oct 10)
- Re: AWS issues with 172.0.0.0/12 Javier J (Oct 10)
- Re: AWS issues with 172.0.0.0/12 Neil Hanlon (Oct 10)
- Re: AWS issues with 172.0.0.0/12 Javier J (Oct 10)
- Re: AWS issues with 172.0.0.0/12 Jay Borkenhagen (Oct 11)
- Re: AWS issues with 172.0.0.0/12 Javier J (Oct 21)
- Re: AWS issues with 172.0.0.0/12 Christopher Morrow (Oct 01)