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Move comment about CNAME limitations to the CNAME box

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Signed-off-by: DL6ER <dl6er@dl6er.de>
This commit is contained in:
DL6ER
2023-11-04 16:41:26 +01:00
parent 1586a94021
commit 351be338fe
1 changed files with 8 additions and 5 deletions
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11
settings-dnsrecords.lp
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@@ -47,10 +47,7 @@ mg.include('scripts/pi-hole/lua/settings_header.lp','r')
</div> </div>
<div class="box-footer clearfix"> <div class="box-footer clearfix">
<strong>Note:</strong> <strong>Note:</strong>
<p>The target of a <code>CNAME</code> must be a domain that the Pi-hole already has in its cache or is authoritative for. This is a universal limitation of <code>CNAME</code> records.</p> <p>Adding/removing local DNS records will flush the cache but does not require a restart of the DNS server.</p>
<p>The reason for this is that Pi-hole will not send additional queries upstream when serving <code>CNAME</code> replies. As consequence, if you set a target that isn't already known, the reply to the client may be incomplete. Pi-hole just returns the information it knows at the time of the query. This results in certain limitations for <code>CNAME</code> targets,
for instance, only <i>active</i> DHCP leases work as targets - mere DHCP <i>leases</i> aren't sufficient as they aren't (yet) valid DNS records.</p>
<p>Additionally, you can't <code>CNAME</code> external domains (<code>bing.com</code> to <code>google.com</code>) successfully as this could result in invalid SSL certificate errors when the target server does not serve content for the requested domain.</p>
<button type="button" id="btnAdd-host" class="btn btn-primary pull-right" data-configkeys="hosts">Add</button> <button type="button" id="btnAdd-host" class="btn btn-primary pull-right" data-configkeys="hosts">Add</button>
</div> </div>
</div> </div>
@@ -109,6 +106,12 @@ mg.include('scripts/pi-hole/lua/settings_header.lp','r')
</div> </div>
</div> </div>
<div class="box-footer clearfix"> <div class="box-footer clearfix">
<strong>Note:</strong>
<p>The target of a <code>CNAME</code> must be a domain that the Pi-hole already has in its cache or is authoritative for. This is a universal limitation of <code>CNAME</code> records.</p>
<p>The reason for this is that Pi-hole will not send additional queries upstream when serving <code>CNAME</code> replies. As consequence, if you set a target that isn't already known, the reply to the client may be incomplete. Pi-hole just returns the information it knows at the time of the query. This results in certain limitations for <code>CNAME</code> targets,
for instance, only <i>active</i> DHCP leases work as targets - mere DHCP <i>leases</i> aren't sufficient as they aren't (yet) valid DNS records.</p>
<p>Additionally, you can't <code>CNAME</code> external domains (<code>bing.com</code> to <code>google.com</code>) successfully as this could result in invalid SSL certificate errors when the target server does not serve content for the requested domain.</p>
<p>Adding/removing local CNAME records will restart the DNS server.</p>
<button type="button" id="btnAdd-cname" class="btn btn-primary pull-right" data-configkeys="cnameRecords">Add</button> <button type="button" id="btnAdd-cname" class="btn btn-primary pull-right" data-configkeys="cnameRecords">Add</button>
</div> </div>
</div> </div>