<div dir="ltr">I have a similar setup, and I do it the way that Greg Choules suggests.<div><br></div><div>I could probably dig up the exact way I have BIND configured, but the function is like this:</div><div>Clients query the non-AD BIND servers, for *all* queries. For the AD zone, we use something like this; Our first level domain, lets assume is <a href="http://example.com">example.com</a>. All domain resources are in <a href="http://ad.example.com">ad.example.com</a>. So we configure the non AD BIND servers to send queries for *.<a href="http://ad.example.com">ad.example.com</a> to the AD servers.</div><div><br></div><div>So, in this way, the non-AD BIND servers handle all queries, but they forward queries for ad.example,com to the AD name servers and return the results.</div><div><br></div><div>I can't tell from the OP if they are using Samba or something else - but we're using Samba in the example above. Samba has a couple of options for their name server, an "internal" name server and a BIND version. Both can be configured to forward any queries they aren't authoritative for to another server. However, IIRC, at least the internal one can't handle large loads. And while we'd probably be fine using it as our "primary" name server, it seems needlessly risky.</div><div><br></div><div>I'd much rather have a well understood and mainstream BIND server as the "front-line" server and then only forward queries for the AD zones to the AD servers. (If you have some odd issue with a query outside the AD server you can have a much larger support base, here, to help understand and fix the issue.) </div><div><br></div><div>YMMV, but this was the way we decided to handle it after quite a bit of consideration. </div><div>I hope that's helpful, though perhaps straying slightly off-topic for the list.</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 27, 2024 at 1:16 PM Greg Choules via bind-users <<a href="mailto:bind-users@lists.isc.org">bind-users@lists.isc.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi Renzo.<div>Ah OK, I had it the wrong way round. AD DNS needs to resolve names in the Internet on behalf of its clients, so it forwards to BIND.</div><div><br></div><div>In that case, two questions:</div><div>1) What version of BIND are you running? You can get this with "named -V"</div><div>2) What is in the file "<a href="http://named.ca" target="_blank">named.ca</a>"?</div><div>For a long time (which is why I need to know the version) BIND has had the Internet root hints built in, so you don't need a hint zone anymore. Unless you are defining different roots for some reason. Hence why I need to know the contents of that file.</div><div><br></div><div>Thanks, Greg</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 27 Jun 2024 at 18:06, Renzo Marengo <<a href="mailto:buckroger2011@gmail.com" target="_blank">buckroger2011@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Hi Greg,</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">thank you very much for your explanation.</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Let’s supposte AD domain was ‘my <a href="http://domain.it" target="_blank"><span style="color:rgb(220,161,13)">domain.it</span></a>’<span> </span>and I have 6000 computers of government institute.<span> </span></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Here my bind configuration:</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">named.conf</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">———</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">include “…. named.conf.options" ;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">zone "." IN {</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>type hint;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>file "<a href="http://named.ca" target="_blank">named.ca</a>";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">};</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">include “…. named.rfc1912.zones";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">include “….<span> </span>named.root.key";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">———</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">named.conf.options</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">———</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>logging {</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>channel named_debug {</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>syslog local6;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>severity debug 1;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>print-category yes;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>print-severity yes;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>print-time yes;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>};</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>category default { named_debug; };</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span> </span>};</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">options {</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>auth-nxdomain no;<span> </span># conform to RFC1035</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>allow-recursion {127.0.0.1; A.B.C.D; dc1.<a href="http://mydomain.it" target="_blank"><span style="color:rgb(220,161,13)">mydomain.it</span></a>; <a href="http://dc2.mydomain.it" target="_blank"><span style="color:rgb(220,161,13)">dc2.mydomain.it</span></a>; ….. } ;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>allow-query <span> </span>{127.0.0.1; A.B.C.D; dc1.<a href="http://mydomain.it" target="_blank"><span style="color:rgb(220,161,13)">mydomain.it</span></a>; <a href="http://dc2.mydomain.it" target="_blank"><span style="color:rgb(220,161,13)">dc2.mydomain.it</span></a>; ….. } ;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>recursive-clients 3000;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>allow-query-cache {127.0.0.1; A.B.C.D; dc1.<a href="http://mydomain.it" target="_blank"><span style="color:rgb(220,161,13)">mydomain.it</span></a>; <a href="http://dc2.mydomain.it" target="_blank"><span style="color:rgb(220,161,13)">dc2.mydomain.it</span></a>; ….. } ; ;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>listen-on port 53 { 127.0.0.1; A.B.C.D; };</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>directory <span style="white-space:pre-wrap"> </span>“….. named";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>dump-file <span style="white-space:pre-wrap"> </span>“….. cache_dump.db";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>statistics-file “….. named_stats.txt";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>memstatistics-file “…. named_mem_stats.txt";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>recursing-file<span> </span>“… named.recursing";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>secroots-file <span> </span>“… named.secroots";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>recursion yes;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>dnssec-enable no;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>dnssec-validation no;</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>bindkeys-file "….. named.iscdlv.key";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>managed-keys-directory "….. dynamic";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>pid-file "….. named.pid";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><span style="white-space:pre-wrap"> </span>session-keyfile "….. session.key";</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">———</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">>Thirdly, I would not forward to AD DNS, unless the AD servers also recurse and can provide >resolution for delegated names below the AD domain </p><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">>that are not hosted on the AD servers themselves.<span> </span></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">There is no forward option to AD DNS. Forward is enable from AD DNS to A.B.C.D. bind9 server.</p><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><br></p><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">All clients are using AD DNS infact every query, about name of ‘<a href="http://mydomain.it" target="_blank">mydomain.it</a>,’ is resolved from AD DNS.</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">When client asks an external domain, e.g. <a href="http://www.google.it" target="_blank"><span style="color:rgb(220,161,13)">www.google.it</span></a>, AD server forward query to A.B.C.D. server. (Forward option is set on every domain controller)</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Only AD DNS<span> </span>make queries to A.B.C.D server and it’s necessary only to solve external domains.</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">A.B.C.D. server never makes queries to AD server. A.B.C.D. is next dns server which partecipates when it’s necessary to resolve an external domain</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:15px"><br></p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">I hope to have explained right.</p>
<p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">I thought A.B.C.D server made query to root server because into configuration there is no reference to forward option, because I thought to set as DNS forward a government dns of my country. What do you think?</p><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">I have doubts about recursive and iterative queries options too.</p><p style="margin:0px;font-stretch:normal;font-size:13px;line-height:normal;font-family:"Helvetica Neue";font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Thanks</p>
<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno gio 27 giu 2024 alle ore 13:24 Greg Choules <<a href="mailto:gregchoules%2Bbindusers@googlemail.com" target="_blank">gregchoules+bindusers@googlemail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi Renzo.<div>Firstly, please can we see your BIND configuration and have the actual AD domain name.</div><div><br></div><div>Secondly, BIND, or any other recursive DNS server, does not 'forward' to the root servers, unless you have configured it explicitly to do so, which would be a bad idea and not work anyway. It will recurse (paradoxically, perform non-recursive aka iterative queries) to the roots and other authoritative servers. It is an important distinction to be aware of.</div><div><br></div><div>Thirdly, I would not forward to AD DNS, unless the AD servers also recurse and can provide resolution for delegated names below the AD domain that are not hosted on the AD servers themselves. Personally I would use a stub or static-stub zone in BIND to refer to the AD domain.<br></div><div><br></div><div>In general, decide which DNS is going to do the resolving and make that the control point, fetching data from wherever it needs to (e.g. AD DNS) - using non-recursive queries - and using that data to construct answers for its clients.</div><div><br></div><div>I hope that helps.</div><div>Cheers, Greg</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 27 Jun 2024 at 12:02, Renzo Marengo <<a href="mailto:buckroger2011@gmail.com" target="_blank">buckroger2011@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>I have Active Directory domain ( '<a href="http://mydomain.it" target="_blank">mydomain.it</a>' ) with 8 domain controllers to manage 8000 computers. Every Domain controller acts as dns service and resolve internal domain names while forward queries about external domains to another server, which Bind9 dns server (It's inside my company)<br></div><div></div><div>I'm checking this Bind9 configuration (Centos server) and I see no forward servers so I think It makes bind9 forward queries directly to root servers. What do you think ?</div><div>According your opinion this Bind9 server should have to forward requests to one or more dns server by forward option?<br></div><div><br></div></div>
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