nanog mailing list archives
Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE
From: "John Levine" <johnl () iecc com>
Date: 2 Apr 2018 11:17:47 -0400
In article <20180402150821.GA24937 () cmadams net> you write:
Once upon a time, Matt Hoppes <mattlists () rivervalleyinternet net> said:Seeing as how 1.1.1.1 isn’t suppose to be routed[citation needed]
Look at the WHOIS info -- 1.1.1.0/24 is assigned to APNIC Research, and it says remarks: ++++++++++++++++++ remarks: + Address blocks listed with this contact remarks: + are withheld from general use and are remarks: + only routed briefly for passive testing. remarks: + remarks: + If you are receiving unwanted traffic remarks: + it is almost certainly spoofed source remarks: + or hijacked address usage. There's a comment at the top saying: descr: APNIC and Cloudflare DNS Resolver project descr: Routed globally by AS13335/Cloudflare descr: Research prefix for APNIC Labs So it's routed deliberately but it sure looks like an experiment. There's way too much equipment that treats 1.1.1.1 as magic for it to work reliably. Captive portals tend to use that address for the host you contact to log out. R's, John
Current thread:
- Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Jeremy L. Gaddis (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Darin Steffl (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Matt Hoppes (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Chris Adams (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE John Levine (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Simon Lockhart (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Seth Mattinen (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE David Conrad (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Seth Mattinen (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Mark Andrews (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Seth Mattinen (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Matt Hoppes (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Darin Steffl (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE nop (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE John R. Levine (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE Alan Buxey (Apr 02)
- Re: Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE James R Cutler (Apr 02)