From: Dave Taht <dave.taht@gmail.com>
To: Jim Gettys <jg@freedesktop.org>
Cc: dnsmasq-discuss <Dnsmasq-discuss@lists.thekelleys.org.uk>,
"cerowrt-devel@lists.bufferbloat.net"
<cerowrt-devel@lists.bufferbloat.net>
Subject: Re: [Cerowrt-devel] Problems with DNSsec on Comcast, with Cero 3.10.38-1/DNSmasq 4-26-2014
Date: Mon, 28 Apr 2014 10:03:35 -0700 [thread overview]
Message-ID: <CAA93jw6ukYcBSEdubFbqoT20MdLLdXHZUbU6Hq+gLWNCaCTY6Q@mail.gmail.com> (raw)
In-Reply-To: <CAGhGL2BeuvR4bNqWbTF5FfNnwW0LC28-z_MJsCQLpb8izHK2oA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 2015 bytes --]
On Mon, Apr 28, 2014 at 9:55 AM, Jim Gettys <jg@freedesktop.org> wrote:
> Comcast recently lit up IPv6 native dual stack in the Boston area.
>
> The http://test-ipv6.com/ web site complains about DNS problems unless
> dnssec is disabled; if it is, I get various timeouts.
>
>
>
Test with IPv4 DNS record
> ok (4.196s)
> Test with IPv6 DNS record
> ok (0.115s) using ipv6
> Test with Dual Stack DNS record
> timeout (11.882s)
>
I don't know what this test does. try a local query over ipv6?
Test for Dual Stack DNS and large packet
> timeout (11.817s)
> Test IPv4 without DNS
> ok (0.214s) using ipv4
> Test IPv6 without DNS
> ok (0.204s) using ipv6
> Test IPv6 large packet
> ok (0.120s) using ipv6
> Test if your ISP's DNS server uses IPv6
> slow (8.752s)
> Find IPv4 Service Provider
> timeout (11.968s)
> Find IPv6 Service Provider
> ok (0.126s) using ipv6 ASN 7922
> Test for buggy DNS
> undefined (5.003s)
>
> DNS server addresses look reasonable for Comcast.
> DNS 1: 75.75.75.75
> DNS 2: 75.75.76.76
>
To try to isolate things a little bit, you can turn off fetching ipv4 dns
servers
with
option peerdns '0'
in the wan (ge00) stanza of /etc/config/network
and let the wan6 stanza fetch them.
A packet capture of it working vs not working would be good.
tcpdump -i ge00 -w cap1.cap port 53
Also capture on the local interface.
DNS 1: 2001:558:feed::1
> DNS 2: 2001:558:feed::2
>
> Today, the problem seems consistent with turning dnssec on and off on the
> router. If enabled, I have problems; if disabled, I get a clean bill of
> health out of test-ipv6.com.
> - Jim
>
>
> _______________________________________________
> Cerowrt-devel mailing list
> Cerowrt-devel@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>
>
--
Dave Täht
NSFW:
https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article
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next prev parent reply other threads:[~2014-04-28 17:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-28 16:55 Jim Gettys
2014-04-28 17:03 ` Dave Taht [this message]
2014-04-28 18:37 ` Dave Taht
2014-04-28 18:56 ` Dave Taht
2014-04-28 19:32 ` [Cerowrt-devel] [Dnsmasq-discuss] " Simon Kelley
2014-04-28 19:45 ` Aaron Wood
2014-04-28 23:24 ` Phil Pennock
2014-04-29 13:22 ` Simon Kelley
2014-04-29 20:57 ` Phil Pennock
2014-04-30 17:26 ` Dave Taht
2014-05-01 18:37 ` Simon Kelley
2014-05-01 20:26 ` Rich Brown
2014-05-01 22:27 ` Dave Taht
2014-05-02 14:30 ` Sebastian Moeller
2014-05-01 18:35 ` Simon Kelley
2014-05-02 16:40 ` James Cloos
2014-10-03 9:28 ` [Cerowrt-devel] " Anders Kaseorg
2014-10-03 17:28 ` Valdis.Kletnieks
2014-10-03 21:35 ` Anders Kaseorg
2014-10-04 21:45 ` Anders Kaseorg
2015-01-08 16:34 ` Simon Kelley
2015-01-08 17:44 ` Dave Taht
2015-01-08 18:07 ` Simon Kelley
2015-01-08 19:52 ` Dave Taht
2015-01-09 8:52 ` Dave Taht
2015-01-09 15:36 ` Simon Kelley
2015-01-09 16:49 ` Simon Kelley
2015-01-09 21:34 ` Dave Taht
2015-01-10 15:37 ` Simon Kelley
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