<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:10pt">Sorry for top-post.<br><br>Your expectation is incorrect.<br><span class="tab"> </span>zone "0/24.110.252.173.in-addr.arpa"<br>is not the same as<br><span class="tab"> </span>zone "173.252.110.24.in-addr.arpa"<div><span><br></span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;">hth,</div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;">Len</div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px;
padding-left: 5px;"> <div style="font-family: tahoma, new york, times, serif; font-size: 10pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> sumsum 2000 <sum2hike@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> bind-users@lists.isc.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, July 8, 2013 11:21 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Reverse Lookups with Forwarders<br> </font> </div> <div class="y_msg_container"><br><div id="yiv2931164791"><div dir="ltr"><pre class="yiv2931164791" id="yiv2931164791comment_text_0">I have a reverse lookup zone file configuration as follows:<br>zone "0/24.110.252.173.in-addr.arpa" {<br> type forward; forward only;<br> forwarders {10.10.96.1;};<br>
};<br><br><br>When I do dig -x 172.252.110.27, I expect it to forward it to 10.10.96.1, but instead, it uses the default resolver.<br></pre><pre class="yiv2931164791" id="yiv2931164791comment_text_0">Am I missing something.<br></pre><pre class="yiv2931164791" id="yiv2931164791comment_text_0"><br><br>The address space <a rel="nofollow" target="_blank" href="http://173.252.110.0/24">173.252.110.0/24</a> matches 255 address ranging from 173.252.110.0-255. So if DNS Server X is configured against this zone , then any reverse DNS request for 173.252.110.0-173.252.110.255 should be forwarded via DNS Server X
Currently this is not the case. There is no forwarding in the above scenario ( where CIDR notation x.x.x.x/Mask is used) . All requests are forwarded via global resolver only
Although a reverse lookup x.x.x.x/Mask does route through DNS Server X but this does not seem to be valid QNAME format for PTR queries.<br><br></pre><pre class="yiv2931164791" id="yiv2931164791comment_text_0">Only when the zone file is changed to <br>
zone "110.252.173.in-addr.arpa" IN {<br> type forward;<br> forwarders {10.10.96.1;};<br> forward only;<br>
};<br><br></pre><pre class="yiv2931164791" id="yiv2931164791comment_text_0">All the requests for <br></pre><pre class="yiv2931164791" id="yiv2931164791comment_text_0">173.252.110.0-173.252.110.255 is forwarded to 10.10.96.1. <br><br><br><br></pre><pre class="yiv2931164791" id="yiv2931164791comment_text_0"><br><br></pre><pre class="yiv2931164791" id="yiv2931164791comment_text_0"><br></pre></div></div><br>_______________________________________________<br>Please visit <a href="https://lists.isc.org/mailman/listinfo/bind-users" target="_blank">https://lists.isc.org/mailman/listinfo/bind-users </a>to unsubscribe from this list<br><br>bind-users mailing list<br><a ymailto="mailto:bind-users@lists.isc.org" href="mailto:bind-users@lists.isc.org">bind-users@lists.isc.org</a><br><a href="https://lists.isc.org/mailman/listinfo/bind-users" target="_blank">https://lists.isc.org/mailman/listinfo/bind-users</a><br><br></div> </div> </div>
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