https://bind9.readthedocs.io/en/v9_18_8/chapter9.html?highlight=cookie
-- Ondřej Surý (He/Him) ond...@isc.org My working hours and your working hours may be different. Please do not feel obligated to reply outside your normal working hours. > On 20. 10. 2022, at 13:49, Andreas S. Kerber <a...@ag-trek.de> wrote: > > Am Thu, Oct 20, 2022 at 01:23:47PM +0200 schrieb Ondřej Surý: >> did you try writing to elbrev.com <http://elbrev.com/> operators to fix >> their servers to stop breaking DNS protocol? It often helps. (I'm ccing the >> contact in their SOA records, so let's see if anything happens.) >> >> It's not lack of EDNS0 support, but they fail to properly process unknown >> EDNS0 options - DNS Cookie in this specific example: > > Hi Ondřej, > > thanks for your quick reply and analysis regarding DNS cookies. > Is there maybe an option to configure 9.18 to act as if it was 9.16 in this > regard? > Honestly I haven't contacted the elbrev.com people (see below). > > >>> Of course I would prefer to upgrade back to 9.18.X, but I guess I won't be >>> able to find all EDNS0 incompatible servers and loosing customers to >>> 8.8.8.8 - which is able to resolve these names.. >> This is kind of moot argument - the DNS needs to evolve, and it can't evolve >> if we keep supporting broken stuff. This needs to be fixed on the >> authoritative operator side, not in BIND 9. > > You're absolutely right. I guess I've just kind of given up on convincing > other people the fix their stuff (dayjob trauma). Sorry about that.
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