Re: long FQDN resolution
Matus UHLAR - fantomas <[email protected]>
| Newsgroups | gmane.network.dns.bind9.user |
|---|---|
| Message-ID | <aCYCb3f9DH21IawP__17564.8178135575$1747321474$gmane$org@fantomas.sk> |
>On 15.05.25 14:31, DEMBLANS Mathieu wrote: >>I have a question about mecanism for requests of long subdomains FQDN. >>Our DNS, which is in recursive configuration, split long fqdn request with subdomains requests like : >> >>Original request from the client to our recursive DNS : A a.b.c.d.example.com >> >>Requests done by our DNS to the domain example.com NS: >>A _.c.d.example.com >>A _b.c.d.example.com >>A a.b.c.d.example.com >> >>Is it a normal behaviour ? >> >>This is only done for 4 levels domains (a.b.example.com for example) and more, not < normal > fqdn (ex : www.example.com). >>What part of the configuration manage this mecanism ? >>Is this really usefull ? >> >>It is problematic for DNSBL requests because it generate a lot of useless requests and this kind of service look at the number of requests done (usage policy): On 15.05.25 17:01, Matus UHLAR - fantomas wrote: >It's been nearly a year since I asked the same, the results are in >list archive: > >https://lists.isc.org/pipermail/bind-users/2024-May/108537.html ...and the solution was: turn off QNAME minimisation on DNS servers used by mailservers for DNSBL/DNSWL checks. -- Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Boost your system's speed by 500% - DEL C:\WINDOWS$\*.* -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list [email protected] https://lists.isc.org/mailman/listinfo/bind-users