On Sun, Sep 10, 2017 at 8:15 PM, Mark Andrews <ma...@isc.org> wrote:
>
> In message <e6f2c93a-c0a4-71ec-b753-fcfb48c07...@acm.org>, Timothe Litt
> writes:
>> The most sensible thing to do is ignore the message, and keep named
>> reasonably up-to-date.
>
> Well something in the resolution path is changing the answer to
> return the old AAAA address which is why I suggested that there may
> be a forwarder involved. One should get a answer like this from
> all of the root server addresses. The exact ordering of the records
> may differ. If one doesn't then something on the path is modifying
> the response.
... and here's a (really ugly) bit of bash to allow you to check all of them:
for letter in `echo "abcdefghijklm" | grep -o .` ; do echo "Letter:
${letter}"; dig ns . @${letter}.root-servers.net | grep
b.root-servers.net | grep AAAA; done
W
>
> ; <<>> DiG 9.12.0-pre-alpha+hotspot+add-prefetch+marka <<>> ns . +norec
> @a.root-servers.net
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29723
> ;; flags: qr aa; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 27
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 1232
> ;; QUESTION SECTION:
> ;. IN NS
>
> ;; ANSWER SECTION:
> . 518400 IN NS a.root-servers.net.
> . 518400 IN NS b.root-servers.net.
> . 518400 IN NS c.root-servers.net.
> . 518400 IN NS d.root-servers.net.
> . 518400 IN NS e.root-servers.net.
> . 518400 IN NS f.root-servers.net.
> . 518400 IN NS g.root-servers.net.
> . 518400 IN NS h.root-servers.net.
> . 518400 IN NS i.root-servers.net.
> . 518400 IN NS j.root-servers.net.
> . 518400 IN NS k.root-servers.net.
> . 518400 IN NS l.root-servers.net.
> . 518400 IN NS m.root-servers.net.
>
> ;; ADDITIONAL SECTION:
> a.root-servers.net. 518400 IN A 198.41.0.4
> b.root-servers.net. 518400 IN A 192.228.79.201
> c.root-servers.net. 518400 IN A 192.33.4.12
> d.root-servers.net. 518400 IN A 199.7.91.13
> e.root-servers.net. 518400 IN A 192.203.230.10
> f.root-servers.net. 518400 IN A 192.5.5.241
> g.root-servers.net. 518400 IN A 192.112.36.4
> h.root-servers.net. 518400 IN A 198.97.190.53
> i.root-servers.net. 518400 IN A 192.36.148.17
> j.root-servers.net. 518400 IN A 192.58.128.30
> k.root-servers.net. 518400 IN A 193.0.14.129
> l.root-servers.net. 518400 IN A 199.7.83.42
> m.root-servers.net. 518400 IN A 202.12.27.33
> a.root-servers.net. 518400 IN AAAA 2001:503:ba3e::2:30
> b.root-servers.net. 518400 IN AAAA 2001:500:200::b
> c.root-servers.net. 518400 IN AAAA 2001:500:2::c
> d.root-servers.net. 518400 IN AAAA 2001:500:2d::d
> e.root-servers.net. 518400 IN AAAA 2001:500:a8::e
> f.root-servers.net. 518400 IN AAAA 2001:500:2f::f
> g.root-servers.net. 518400 IN AAAA 2001:500:12::d0d
> h.root-servers.net. 518400 IN AAAA 2001:500:1::53
> i.root-servers.net. 518400 IN AAAA 2001:7fe::53
> j.root-servers.net. 518400 IN AAAA 2001:503:c27::2:30
> k.root-servers.net. 518400 IN AAAA 2001:7fd::1
> l.root-servers.net. 518400 IN AAAA 2001:500:9f::42
> m.root-servers.net. 518400 IN AAAA 2001:dc3::35
>
> ;; Query time: 179 msec
> ;; SERVER: 2001:503:ba3e::2:30#53(2001:503:ba3e::2:30)
> ;; WHEN: Mon Sep 11 10:09:10 AEST 2017
> ;; MSG SIZE rcvd: 811
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
> _______________________________________________
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--
I don't think the execution is relevant when it was obviously a bad
idea in the first place.
This is like putting rabid weasels in your pants, and later expressing
regret at having chosen those particular rabid weasels and that pair
of pants.
---maf
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