I'm surprised that no one else has corrected this, so allow me to do so for the record. No, Mehmet's public IP was _not_ from the RFC 1918 172.16.0.0/16 range. One of the public ipv4 ranges that AT&T assigns subscriber addresses from is 172.0.0.0/12: [ 172.0.0.0 - 172.15.255.255 ] https://whois.arin.net/rest/net/NET-172-0-0-0-1 One of the private ipv4 ranges set aside by RFC 1918 is the neighboring 172.16.0.0/12: [ 172.16.0.0 - 172.31.255.255 ] https://whois.arin.net/rest/net/NET-172-16-0-0-1 We notice more mis-originations of our 172.0.0.0/12 space and its more-specifics than any of our other ipv4 blocks, probably because other folks are similarly confused. So please, if you intend to use RFC1918 space, please check your filters to make sure you're using 172.16.0.0/12 and not our 172.0.0.0/12. Jay B. Mehmet Akcin writes:
Yes
On Wed, Oct 9, 2019 at 20:46 Javier J <javier@advancedmachines.us> wrote:
I'm just curious, was the ip in the RFC 1918 172.16.0.0/16 range?
https://tools.ietf.org/html/rfc1918
On Mon, Oct 7, 2019 at 6:01 PM Mehmet Akcin <mehmet@akcin.net> wrote:
To close the loop here (in case if someone has this type of issue in the future), I have spoken to AT&T instead of trying to work it out with AWS Hosted Vendor, Reolink.
AT&T Changed my public IP, and now I am no longer in that 172.x.x.x block, everything is working fine.
mehmet
On Thu, Oct 3, 2019 at 2:54 PM Javier J <javier@advancedmachines.us> wrote:
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 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.
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.
-- Mehmet +1-424-298-1903