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https://support.microsoft.com/en-us/help/832223/some-dns-name-queries-are-unsuccessful-after-you-deploy-a-windows-base
Mar 29, 2017 · Describes an issue that occurs because of the Extension Mechanisms for DNS (EDNS0) functionality that is supported in Windows Server DNS. Provides a resolution and workaround. Some DNS name queries are unsuccessful after you deploy a …
https://en.wikipedia.org/wiki/Extension_mechanisms_for_DNS
Extension mechanisms for DNS (EDNS) is a specification for expanding the size of several parameters of the Domain Name System (DNS) protocol which had size restrictions that the Internet engineering community deemed too limited for increasing functionality of the protocol. The first set of extensions was published in 1999 by the Internet Engineering Task Force as RFC 2671, also known as EDNS0 ...
https://social.technet.microsoft.com/Forums/en-US/4aea5fd1-4a79-4b8e-9f01-bc7d47d15da9/windows-server-2008-issue-with-dns-queries-that-contain-edns0-section
Dec 04, 2016 · >>From my POV, it appears more that it's the Windows Server itself that does not support EDNS0. EDNS0 was support by windows server 2008, and it is enabled by default in windows server 2008. Best Regards. ... If yes does it do the correct thing if the EDNS0 record has an unknown type. The protocol says the server should ignore the record, but ...
https://blogs.msmvps.com/acefekay/2010/10/11/edns0-extension-mechanisms-for-dns/
Oct 11, 2010 · Windows 2003 and newer operating systems support EDNS0 Extension mechanisms for DNS). The first set of EDNS0 extensions were published in 1999 by the Internet Engineering Task Force as RFC 2671. EDNS0 supports a UDP query response larger than 512 bytes. Using the legacy method, UDP was used only as long as the DNS query was under 512 …
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.hald001/intrareout.htm
The resolver might believe that the name server supports EDNS0 (EDNS0 Support = Up-level), that the name server does not support EDNS0 (EDNS0 Support = Down-level), or that the capability of the name server is undetermined (EDNS0 Support = Unknown). 4 A REXX application calls GetHostByName at the indicated local date and time.
https://morgansimonsen.com/2010/04/20/windows-and-extension-mechanisms-for-dns-edns/
RFC 2671 defines the Extension mechanisms for DNS (EDNS), or EDNS0 as it is also known. EDNS is a specification for expanding the size of several parameters of the Domain Name System (DNS) protocol. More info about EDNS here. As of Windows Server 2008 R2, the Windows DNS service will use EDNS in its queries to other DNS servers.
https://www.edge-cloud.net/2019/03/01/limitations-of-geo-dns/
The EDNS0-Client-Subnet (ECS) extension allows a recursive DNS Resolver to specify the network subnet for the host on which behalf it is making a DNS query. Therefore the Authoritative Nameserver will gain insight into the location of the client based on GeoIP information. Unfortunately not all DNS Resolvers support EDNS0-Client-Subnet.
https://github.com/coredns/coredns/issues/2328
Nov 20, 2018 · This domain is going to work after the 2019 DNS flag day BUT it does not support the latest DNS standards. As a consequence this domain cannot support the latest security features and might be an easier target for network attackers than …
https://docs.microsoft.com/en-us/powershell/module/dnsserver/set-dnsserveredns
Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session …
https://docs.microsoft.com/en-us/windows-server/networking/dns/what-s-new-in-dns-server
Unknown record support. An "Unknown Record" is an RR whose RDATA format is not known to the DNS server. The newly added support for unknown record (RFC 3597) types means that you can add the unsupported record types into the Windows DNS server zones in …
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