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https://support.opendns.com/hc/en-us/articles/227987687-Using-dig-for-testing-EDNS-client-subnet
Jul 28, 2017 · Using dig for testing EDNS client-subnet Robbie Grue Updated July 27 ... BIND has support for sending clientsubnet information in EDNS data using the `dig` utility as of version 9.10. Versions previous to this require that support be compiled in with a separate patch.
https://kb.isc.org/docs/aa-01350
Sep 20, 2018 · The EDNS fallback code was re-worked in BIND 9.10 to make it more resilient and reliable when: Encountering new authoritative servers that have not been queried before and for whom the capabilities/support for EDNS and large buffer sizes by both the server and the network path between it and the resolver is unknown.
https://www.isc.org/support/
ISC offers professional technical support for BIND 9. Available support services include: Private, expert support with a Service Level Agreement (SLA) (Bronze level and above) Access to BIND -S Subscriber-only edition (Silver level and above) Proactive notification of security issues before public announcement (when possible), at all paid ...
https://vincent.bernat.ch/en/blog/2014-bind-edns0-client-subnet
Mar 18, 2014 · EDNS client subnet support patch for BIND; To provide geolocation-aware answers with BIND, a common solution is to use a patch adding GeoIP support. A client can be directed to the closest (and hopefully fastest) web server:
https://stackoverflow.com/questions/47259847/i-want-to-query-edns-with-bind-whats-edns-disabled
In this particular case, the server is dropping queries that contain the new EDNS Cookie option which are sent by default in BIND 9.11. Dropping the packets in this way is contrary to the EDNS specification.
https://www.linuxquestions.org/questions/linux-server-73/bind-edns0-client-subnet-support-4175561848/
Dec 27, 2015 · Hi, I'm trying to have EDNS implemented on my network, I installed BIND 9.10.3-P2 which is the latest version these days. I got it working (I think), ... BIND EDNS0-client-subnet support. Hi, I'm trying to have EDNS implemented on my network, I installed BIND 9.10.3-P2 which is the latest version these days. I got it working (I think), but I'm ...
https://kb.isc.org/docs/aa-01387
Feb 25, 2019 · DNS COOKIE is an Extended DNS (EDNS) option which, when both the client and server support it, allows the client to detect and ignore off-path spoofed responses, and the server to determine that a client's address is not spoofed.
https://www.zytrax.com/books/dns/ch7/server.html
DNS BIND Server Clause. This section describes the server clause available in BIND 9.x named.conf. The server clause allows certain characteristics to be defined when this server is interacting with the remote server defined by ip-addr (IPv4 or IPv6). The ip_addr will only take a single IP value. There may be any number of server statements.Full list of statements.
https://www.isc.org/bind/
BIND 9 also has a Negative Trust Anchor feature, which temporarily disables DNSSEC validation when there is a problem with the authoritative server’s DNSSEC support. BIND 9 offers support for RFC 5011 maintenance of root key trust anchors.
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 ...
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