19 Zář
2022
19 Zář
'22
13:29
Hi Blažej,
can you trace the query using this feature?
https://knot-resolver.readthedocs.io/en/stable/modules-http-trace.html#usin…
This will provide extremely detailed information on why Knot resolver
responds with SERVFAIL.
Best regards
Robert
On Mon, Sep 19, 2022 at 1:25 PM Blažej Krajňák <blazej.krajnak(a)gmail.com>
wrote:
Hello everyone,
at AS50242 we experience problem with resolving
connectivity.samsung.com.cn
We run two servers, each with 4 instances. Both servers have working
dual-stack (v4/v6).
knot-dnsutils/unknown,now 3.1.1-cznic.1 amd64 [installed]
knot-resolver-module-http/unknown,now 5.5.0-cznic.1 all
[installed,automatic]
knot-resolver-release/unknown,now 1.9-1 all [installed]
knot-resolver/unknown,now 5.5.0-cznic.1 amd64 [installed]
Dnsviz shows problem reaching few IPv6 servers of .cn TLD via UDP. I
can not understand, why both of our servers response with SERVFAIL.
Any ideas how to troubleshoot more?
Thank you,
Blažej
--
--
Robert Šefr
CTO
robert.sefr(a)whalebone.io | +420608737930 | www.whalebone.io
Whalebone, s.r.o.
Jezuitská 14/13, 602 00 Brno
Czech Republic