nanog mailing list archives
Cloudflare 1.1.1.1 public DNS broken w/ AT&T CPE
From: "Jeremy L. Gaddis" <lists-nanog () gadd is>
Date: Sun, 1 Apr 2018 16:59:52 -0400
Greetings, If anyone at 7018 wants to pass a message along to the correct folks, please let them know that Cloudflare's new public DNS service (1.1.1.1) is completely unusable for at least some of AT&T's customers. There is apparently a bug with some CPE (including the 5268AC). From behind such CPE, the services at 1.1.1.1 are completely unreachable, whether via (ICMP) ping, DNS, or HTTPS. Using the 5268AC's web-based diagnostic tools, pinging 1.1.1.1 returns the following results: ping successful: icmp seq:0, time=2.364 ms ping successful: icmp seq:1, time=1.085 ms ping successful: icmp seq:2, time=1.160 ms ping successful: icmp seq:3, time=1.245 ms ping successful: icmp seq:4, time=0.739 ms RTTs to the CPE's default gateway are, at minimum, ~20 ms. A traceroute (using the same web-based diagnostic tool built-in to the CPE) reports, simply: traceroute 1.1.1.1 with: 64 bytes of data 1: 1.1.1.1(1dot1dot1dot1.cloudflare-dns.com), time=0 ms I haven't bothered to report this to AT&T through the standard customer support channels (for reasons that should be obvious to anyone who has ever called AT&T's consumer/residential technical support) but if anyone at AT&T wants to pass the info along to the appropriate group, it would certainly be appreciated. Thanks, -Jeremy -- Jeremy L. Gaddis "The total budget at all receivers for solving senders' problems is $0. If you want them to accept your mail and manage it the way you want, send it the way the spec says to." --John Levine
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)