<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:#000000">Hi Bind Users,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:#000000">Currently drained my brain troubleshooting where could be the cause of my issue on one of our Authoritative DNS server.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:#000000">When querying a CNAME directly to the server, where a CNAME is pointed to an external domain, results failed with timeout error and no server could be reached.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:#000000"><i>; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.2 <<>> <a href="http://book.cebupacificair.com">book.cebupacificair.com</a> @<a href="http://dns1.globenet.com.ph">dns1.globenet.com.ph</a><br>;; global options: +cmd<br>;; connection timed out; no servers could be reached</i><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span style="font-family:Arial"><font color="#0b5394" size="2"><b><br></b></font></span></div><div><span style="font-family:Arial"><font color="#0b5394" size="2"><span class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><b></b>Server logs produce 3 query log then show a query failed (timed out);</span></font></span></div><div><span style="font-family:Arial"><font color="#0b5394" size="2"><span class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><b><br></b></span></font></span></div><i>client @0x7fd9ac0908d0 <span class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">x.x.x.x</span>#51579 (<a href="http://book.cebupacificair.com">book.cebupacificair.com</a>): query: <a href="http://book.cebupacificair.com">book.cebupacificair.com</a> IN A +E(0) (203.177.255.10)<br>client @0x7fd9a4484080 <span class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">x.x.x.x</span>#51579 (<a href="http://book.cebupacificair.com">book.cebupacificair.com</a>): query: <a href="http://book.cebupacificair.com">book.cebupacificair.com</a> IN A +E(0) (203.177.255.10)<br>client @0x7fd9a4481cb0 <span class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">x.x.x.x</span>#51579 (<a href="http://book.cebupacificair.com">book.cebupacificair.com</a>): query: <a href="http://book.cebupacificair.com">book.cebupacificair.com</a> IN A +E(0) (203.177.255.10)<br></i><div><i>client @0x7fd9ac0908d0 <span class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">x.x.x.x</span>#51579 (<a href="http://book.cebupacificair.com">book.cebupacificair.com</a>): query failed (timed out) for <a href="http://book.cebupacificair.com/IN/A">book.cebupacificair.com/IN/A</a> at query.c:6786</i><span style="font-family:Arial"><font color="#0b5394" size="2"><span class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><b><i></i></b></span><br></font></span></div><div><span style="font-family:Arial"><font color="#0b5394" size="2"><b><br></b></font></span></div><div><font size="2" style=""><span class="gmail_default" style=""><b style="color:rgb(0,0,0);font-family:tahoma,sans-serif;font-size:small"></b><font color="#000000" face="tahoma, sans-serif">But when i send a query with <b>+norecurse</b> option, results is successful.</font><b style="color:rgb(0,0,0);font-family:tahoma,sans-serif;font-size:small"></b></span><br></font></div><div><font size="2" style=""><span class="gmail_default" style=""><b style="color:rgb(0,0,0);font-family:tahoma,sans-serif;font-size:small"><br></b></span></font></div><div><i style="">dig <b style=""><span class="gmail_default" style="font-family:tahoma,sans-serif;color:rgb(0,0,0)"></span>+norecurse</b> <a href="http://book.cebupacificair.com">book.cebupacificair.com</a> @<a href="http://dns1.globenet.com.ph">dns1.globenet.com.ph</a><br><br>; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.2 <<>> +norecurse <a href="http://book.cebupacificair.com">book.cebupacificair.com</a> @<a href="http://dns1.globenet.com.ph">dns1.globenet.com.ph</a><br>;; global options: +cmd<br>;; Got answer:<br>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19755<br>;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 5<br><br>;; OPT PSEUDOSECTION:<br>; EDNS: version: 0, flags:; udp: 4096<br>;; QUESTION SECTION:<br>;<a href="http://book.cebupacificair.com">book.cebupacificair.com</a>. IN A<br><br>;; ANSWER SECTION:<br><a href="http://book.cebupacificair.com">book.cebupacificair.com</a>. 1200 IN CNAME <a href="http://book.cebupacair.cust.lldns.net">book.cebupacair.cust.lldns.net</a>.<br><br>;; AUTHORITY SECTION:<br><a href="http://lldns.net">lldns.net</a>. 171335 IN NS <a href="http://ns1.lldns.net">ns1.lldns.net</a>.<br><a href="http://lldns.net">lldns.net</a>. 171335 IN NS <a href="http://ns2.lldns.net">ns2.lldns.net</a>.<br><br>;; ADDITIONAL SECTION:<br><a href="http://ns1.lldns.net">ns1.lldns.net</a>. 149880 IN A 208.111.184.11<br><a href="http://ns2.lldns.net">ns2.lldns.net</a>. 93416 IN A 208.111.184.12<br><a href="http://ns1.lldns.net">ns1.lldns.net</a>. 93416 IN AAAA 2607:f4e8:ac:1::11<br><a href="http://ns2.lldns.net">ns2.lldns.net</a>. 93416 IN AAAA 2607:f4e8:ac:1::12<br><br>;; Query time: 1 msec<br>;; SERVER: 203.177.255.10#53(203.177.255.10)<br>;; WHEN: Wed Jul 03 03:36:21 EDT 2019<br>;; MSG SIZE rcvd: 229</i><font size="2" style=""><span class="gmail_default" style=""><b style="color:rgb(0,0,0);font-family:tahoma,sans-serif"><br></b></span></font></div><div><font size="2" style=""><span class="gmail_default" style=""><b style="color:rgb(0,0,0);font-family:tahoma,sans-serif;font-size:small"><br></b></span></font></div><div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">This is the named.conf options;</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><i>options {<br> directory "/var/namedb";<br> version "Query Not Allowed.";<br> allow-recursion { globenet; };<br> recursive-clients 1000000;<br> allow-query-cache { globenet; };<br> allow-query { any; };<br> tcp-clients 5000;<br><br> blackhole { bogusnet; };<br><br> pid-file "/var/local/bind/var/run/named.pid";<br> zone-statistics yes;<br> statistics-file "/var/namedb/named.stats";<br>};</i><br></div><br></div><div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">Bind version is 9.14.2</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><br></div></div><div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">The "globenet" group are the list of IPs we allowed for recursion. And this issue happens only on the CNAME record with external domain.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">Thank you in advance.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small;color:rgb(0,0,0)">Regards,</div></div><div><span style="font-family:Arial"><font color="#0b5394" size="2"><b>Wil Sarmiento</b></font></span></div><div><br><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><input name="virtru-metadata" type="hidden" value="{"email-policy":{"state":"closed","expirationUnit":"days","disableCopyPaste":false,"disablePrint":false,"disableForwarding":false,"enableNoauth":false,"persistentProtection":false,"expandedWatermarking":false,"expires":false,"isManaged":false},"attachments":{},"compose-id":"9","compose-window":{"secure":false}}"></div>
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