<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=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@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;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:8.0pt;
margin-left:.5in;
mso-add-space:auto;
line-height:106%;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.MsoListParagraphCxSpFirst, li.MsoListParagraphCxSpFirst, div.MsoListParagraphCxSpFirst
{mso-style-priority:34;
mso-style-type:export-only;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
mso-add-space:auto;
line-height:106%;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.MsoListParagraphCxSpMiddle, li.MsoListParagraphCxSpMiddle, div.MsoListParagraphCxSpMiddle
{mso-style-priority:34;
mso-style-type:export-only;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
mso-add-space:auto;
line-height:106%;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
p.MsoListParagraphCxSpLast, li.MsoListParagraphCxSpLast, div.MsoListParagraphCxSpLast
{mso-style-priority:34;
mso-style-type:export-only;
margin-top:0in;
margin-right:0in;
margin-bottom:8.0pt;
margin-left:.5in;
mso-add-space:auto;
line-height:106%;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
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;}
/* List Definitions */
@list l0
{mso-list-id:314798372;
mso-list-type:hybrid;
mso-list-template-ids:1779214822 67698689 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.25in;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.75in;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:1.25in;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:1.75in;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:2.25in;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:2.75in;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:3.25in;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:3.75in;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:4.25in;
text-indent:-.25in;
font-family:Wingdings;}
@list l1
{mso-list-id:1591810985;
mso-list-type:hybrid;
mso-list-template-ids:-1023638 67698689 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l1:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.25in;
text-indent:-.25in;
font-family:Symbol;}
@list l1:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.75in;
text-indent:-.25in;
font-family:"Courier New";}
@list l1:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:1.25in;
text-indent:-.25in;
font-family:Wingdings;}
@list l1:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:1.75in;
text-indent:-.25in;
font-family:Symbol;}
@list l1:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:2.25in;
text-indent:-.25in;
font-family:"Courier New";}
@list l1:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:2.75in;
text-indent:-.25in;
font-family:Wingdings;}
@list l1:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:3.25in;
text-indent:-.25in;
font-family:Symbol;}
@list l1:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:3.75in;
text-indent:-.25in;
font-family:"Courier New";}
@list l1:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:4.25in;
text-indent:-.25in;
font-family:Wingdings;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">Firstly, thanks for the advice about the hidden master the other day, that’s now setup, working fine and we’ve just finished transferring about 4500 records across!<o:p></o:p></p>
<p class="MsoNormal">My software team came up this morning and slapped me across the face with a wet fish (figuratively speaking as It’s not Thursday yet!) by informing me that they are developing a mobile app for one of our companies that Apple have mandated
an ipv6 DNS requirement before they publish.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">At the moment, all our infrastructure from ISP device inwards is ipv4 so setting up the zone on our DNS is going to require a lot of significant changes! There are a couple of things reference all this that I’m unsure about and am hoping
you can educate me on.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Firstly, we are running bind 9.11 on Debian 10 hosts. <o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraphCxSpFirst" style="margin-left:-.25in;mso-add-space:auto;mso-list:l1 level1 lfo1">
Is it worth use upgrading to Debian 11 to get the newer version of bind?<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-left:-.25in;mso-add-space:auto;mso-list:l1 level1 lfo1">
Are there any issues/bugs/holes in 9.11 that will cause us a problem, especially if we start messing with ipv6?<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-left:-.25in;mso-add-space:auto;mso-list:l1 level1 lfo1">
If I do upgrade the on-premise servers, is it better to do master then slaves or the other way around?<o:p></o:p></li><li class="MsoListParagraphCxSpLast" style="margin-left:-.25in;mso-add-space:auto;mso-list:l1 level1 lfo1">
If we have DNSSEC configured, is it going to break anything upgrading? (I have lots of backups of the zones and hosts files)<o:p></o:p></li></ul>
<p class="MsoNormal">Secondly, reference bind config<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraphCxSpFirst" style="margin-left:-.25in;mso-add-space:auto;mso-list:l0 level1 lfo2">
For the “listen-on-v6” statement, are the only options still ‘none’ or ‘all’?<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-left:-.25in;mso-add-space:auto;mso-list:l0 level1 lfo2">
Can the “listen-on-v6” only be enabled globally in the ‘named.conf.options’ or is it possible to enable per zone as we are (currently) only going to have 1 zone needing ipv6?<o:p></o:p></li><li class="MsoListParagraphCxSpLast" style="margin-left:-.25in;mso-add-space:auto;mso-list:l0 level1 lfo2">
Once ipv6 is enabled. Is it advisable to setup a sub-domain for the ipv6 addresses to avoid dual-stacking?<o:p></o:p></li></ul>
<p class="MsoNormal">The reverse zones for our ipv4 are handled (badly) by our local telecoms provider. How big an issue is it going to be for ipv6 if the reverse lookups are badly/not implemented?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If our ISP can’t give us a public ipv6 address, can we still run our bind to give out ipv6 addresses or not?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Finally, can anyone point me towards any good reading on bind configuration and DNS best practice (preferably with idiot proof examples)? I must decide fairly quickly if we roll this zone back to our domain registrar who is setup to handle
ipv6 or do we strike out and bring our DNS setup up to date and future proofed!<br>
<br>
<o:p></o:p></p>
<p class="MsoNormal">Thanks for your time and expertise. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="RO" style="font-size:12.0pt">Andy Baker<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="RO"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>