When a nameserver receives a recursive query, it will first look to see if it has the answer in cache or is authoritative for the domain in which the answer for the name being queried should reside. Otherwise it will

; If for some option the client should use the value supplied by the server, but needs to use some default value if no value was supplied by the server, these values can be defined in the default statement. The

On some networks, IPv6 is used internally, but is not supported by the link to the rest of the Internet. This degrades resolver performance due to named attempting to use IPv6 transport to send queries that can never be answered

A logic error can cause the named process to exit unintentionally. CVE:  CVE-2007-0493   Posting date:  30 Jan 2007 Program Impacted:  BIND Versions affected: 9.3.0, 9.3.1, 9.3.2, 9.3.3, Alpha and Beta

CVE: CVE-2023-4408 Title: Parsing large DNS messages may cause excessive CPU load Document version: 2.0 Posting date: 13 February 2024 Program impacted: BIND 9 Versions affected: BIND 9.0.0 -> 9.16.45 9.18.0 -> 9

Debian System-Specific Install Notes Updated on 14-December-2018 This page documents Kea 1.5 installation on Debian 9.6 (amd64-netinst). While these instructions were thoroughly tested with Kea 1.5 at release time, if you are using

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

ISC DHCP is EOL ISC no longer maintains this software. See this web page for resources on migrating to ISC's newer Kea DHCP server . dhcpd NAME dhcpd - Dynamic Host Configuration Protocol Server SYNOPSIS dhcpd [ -p port ] [ -f ] [ -d ] [ -q

DKIM -- short for "DomainKeys Identified Mail" -- is a mechanism that provides integrity controls over parts of an email transmission. More information about the protocol can be found at  http://www.dkim.org/ , as this article will deal only with the

from it.  (Note that receipt of a notify (which is a UDP packet travelling from primary to secondary) doesn't guarantee that the primary will be reachable from the secondary, but it does ensure quicker recovery in the situation where

Security Vulnerability Disclosure Policy . This Knowledgebase article is the complete and official security advisory document. Legal Disclaimer: Internet Systems Consortium (ISC) is providing this notice on an "AS IS" basis. No warranty or guarantee of any kind is expressed in

Overview ISC provides binary packages and the corresponding source code for Kea DHCP hosted on Cloudsmith . Packages and source code tarballs are provided for every release. Thank you to Cloudsmith! The repository for Kea open source packages is provided by

Welcome! ISC publishes free open source software. You can participate by sending bug reports, writing or fixing documentation, and submitting patches or even new features. Answering questions on the public mailing lists is another great way to contribute to the

installation, so ldconfig must be run to ensure that the previously installed libraries are available. ldconfig wget https://github.com/CESNET/Netopeer2/archive/v0.7-r1.tar.gz && \ tar -xf v0.7-r1.tar.gz && \ rm v0.7-r1.tar

Posting date: 19 February 2021; updated 22 February 2021 Program impacted: BIND Versions affected: BIND 9.16.12, BIND 9.16.12-S1 (Supported Preview Edition), and versions 9.17.0 -> 9.17.10 of the 9.17 development branch

The named-rrchecker tool (introduced in BIND 9.10) can be used to verify the syntactic correctness of individual resource records, or to convert them into a canonical format so that a newly defined record type can be loaded into

mention here for completeness.

Buffer overflow in the DNS resolver code used in libc, glibc, and libbind, as derived from ISC BIND, allows remote malicious DNS servers to cause a denial of service and possibly execute arbitrary code via the stub resolvers. CVE:  [CVE

AAAA Filtering When acting as a resolver, BIND 9 has an option to filter AAAA (IPv6 address) records returned to the client, based on the transport used for the query (IPv4 or IPv6) and other filtering conditions.  This filtering does

domain-name-servers for DHCPv4 vs. dns-servers for DHCPv6). The subnet configurations are very similar aside from the opening stanza being subnet6 vs. subnet4 for DHCPv4, and IPv6 addresses appear instead of IPv4 addresses. Two more differences are