[prev in list] [next in list] [prev in thread] [next in thread]
List: unbound-users
Subject: Synthetic/Artificial domain support?
From: "Guevara, Daniel via Unbound-users" <unbound-users () lists ! nlnetlabs ! nl>
Date: 2021-11-09 1:54:39
Message-ID: 312D2CC8-372A-485E-8D22-C394A9B44559 () corp ! intuit ! net
[Download RAW message or body]
[Attachment #2 (text/plain)]
Hello,
We recently switched to using Unbound instead of DNSMasq to forward DNS requests to \
upstream servers. As a result we were informed that the change ‘broke" AWS EMR \
deployments. Since AWS VPC can be large and instances come and go quickly the \
previous deployments leveraged doing forward and reverse DNS with a synthetic domain \
option: https://serverfault.com/questions/862279/dnsmasq-as-authoritative-dns-server-with-synth-domain
dnsmasq --listen-address=127.0.0.1 --synth-domain=vpc.internal,10.140.0.0/21,ip-
A lookup for an IP in the CIDR block 10.140.0.0/21 will return a name that it \
constructs with the parameters provided (for reverse DNS), it will also work for \
forward look ups.
My question is if there is a similar option for Unbound? I cannot find anything in \
the documentation besides creating a local zone file with all the possible Ips/Names \
configured.
Thanks!
--
Daniel
[Attachment #3 (text/html)]
<html xmlns:v="urn:schemas-microsoft-com:vml" \
xmlns:o="urn:schemas-microsoft-com:office:office" \
xmlns:w="urn:schemas-microsoft-com:office:word" \
xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" \
xmlns="http://www.w3.org/TR/REC-html40"> <head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">Hello, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We recently switched to using Unbound instead of DNSMasq to \
forward DNS requests to upstream servers. As a result we were informed that the \
change ‘broke" AWS EMR deployments. Since AWS VPC can be large and instances come \
and go quickly the previous deployments leveraged doing forward and reverse DNS with \
a synthetic domain option:<o:p></o:p></p> <p class="MsoNormal"><a \
href="https://serverfault.com/questions/862279/dnsmasq-as-authoritative-dns-server-wit \
h-synth-domain">https://serverfault.com/questions/862279/dnsmasq-as-authoritative-dns-server-with-synth-domain</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">dnsmasq --listen-address=127.0.0.1 \
--synth-domain=vpc.internal,10.140.0.0/21,ip-<o:p></o:p></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">A lookup for an IP in \
the CIDR block 10.140.0.0/21 will return a name that it constructs with the \
parameters provided (for reverse DNS), it will also work for forward look \
ups.<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My question is if there is a similar option for Unbound? I \
cannot find anything in the documentation besides creating a local zone file with all \
the possible Ips/Names configured. <br>
<br>
Thanks!<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal">-- <o:p></o:p></p>
<p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Daniel</span><span \
style="font-size:12.0pt;color:black"><o:p></o:p></span></p> </div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic