<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFCC" text="#000000">
It means that something in your path limits packet size. That could
likely be a firewall or router with a "helpful" function to pass DNS
packets on; only it thinks that a DNS packet can only be 512 bytes
long.<br>
<br>
<div class="moz-cite-prefix">On 31/12/12 10:49, Gaurav Kansal wrote:<br>
</div>
<blockquote cite="mid:002801cde73c$1ffa3e00$5feeba00$@nic.in"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="Generator" content="Microsoft Word 14 (filtered
medium)">
<style><!--
/* Font Definitions */
@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;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
h2
{mso-style-priority:9;
mso-style-link:"Heading 2 Char";
margin-top:10.0pt;
margin-right:0in;
margin-bottom:0in;
margin-left:0in;
margin-bottom:.0001pt;
page-break-after:avoid;
font-size:13.0pt;
font-family:"Cambria","serif";
color:#4F81BD;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.Heading2Char
{mso-style-name:"Heading 2 Char";
mso-style-priority:9;
mso-style-link:"Heading 2";
font-family:"Cambria","serif";
color:#4F81BD;
font-weight:bold;}
.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;}
--></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]-->
<div class="WordSection1">
<p class="MsoNormal">Hello Team,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am getting too many entries for reducing
the EDNS Packet size to 512 bytes in my log file.<o:p></o:p></p>
<p class="MsoNormal">For Eg:<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:8.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:20 IPv6-DNS named[3769]: success resolving
'dns1.vps.net/A' (in 'vps.net'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:21 IPv6-DNS named[3769]: success resolving
'ad.metanetwork.com/A' (in 'metanetwork.com'?) after
reducing the advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:25 IPv6-DNS named[3769]: success resolving
'geo.admetanetwork.com/A' (in 'admetanetwork.com'?) after
reducing the advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:31 IPv6-DNS named[3769]: success resolving
'tomcat.apache.org/A' (in 'apache.org'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:31 IPv6-DNS named[3769]: success resolving
'<a class="moz-txt-link-abbreviated" href="http://www.apache.org/A">www.apache.org/A</a>' (in 'apache.org'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:31 IPv6-DNS named[3769]: success resolving
'issues.apache.org/A' (in 'apache.org'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:34 IPv6-DNS named[3769]: success resolving
'ns1.zurich.surf.net/A' (in 'surf.net'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:34 IPv6-DNS named[3769]: success resolving
'ns2.surfnet.nl/AAAA' (in 'surfnet.nl'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:34 IPv6-DNS named[3769]: success resolving
'ns2.surfnet.nl/A' (in 'surfnet.nl'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:34 IPv6-DNS named[3769]: success resolving
'ns1.zurich.surf.net/AAAA' (in 'surf.net'?) after reducing
the advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:34 IPv6-DNS named[3769]: success resolving './NS' (in
'.'?) after reducing the advertised EDNS UDP packet size to
512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:40 IPv6-DNS named[3769]: success resolving
'ns1.zurich.surf.net/A' (in 'surf.net'?) after reducing the
advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Dec 31
03:07:40 IPv6-DNS named[3769]: success resolving
'ns1.zurich.surf.net/AAAA' (in 'surf.net'?) after reducing
the advertised EDNS UDP packet size to 512 octets<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal">On googling for this, I got to know that
this come when remote DNS Server doesn’t support EDNS0 (i.e.,
packet size upto 4096 bytes).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Now I want to know whether my DNS Server
supports EDNS0 for incoming request or not.<o:p></o:p></p>
<p class="MsoNormal">I use the ‘<b>OARC's DNS Reply Size Test
Server’ </b>for the same and I got the below mentioned O/P:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">#dig +short rs.dns-oarc.net txt<o:p></o:p></p>
<p class="MsoNormal">rst.x476.rs.dns-oarc.net.<o:p></o:p></p>
<p class="MsoNormal">rst.x450.x476.rs.dns-oarc.net.<o:p></o:p></p>
<p class="MsoNormal">rst.x490.x450.x476.rs.dns-oarc.net.<o:p></o:p></p>
<p class="MsoNormal">"Tested at 2012-12-31 09:40:11 UTC"<o:p></o:p></p>
<p class="MsoNormal">"164.100.1.206 sent EDNS buffer size 4096"<o:p></o:p></p>
<p class="MsoNormal">"164.100.1.206 DNS reply size limit is at
least 490"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does this mean that my server is not
supporting EDNS0 ???<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 style="color:#76923C">Thanks and
Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#76923C">Gaurav Kansal<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#76923C">Mob –
9910118448<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#76923C"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#76923C">Happy New Year
2013.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:gray">IPv4 is Over,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:gray">Are your ready for
new Network.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Please visit <a class="moz-txt-link-freetext" href="https://lists.isc.org/mailman/listinfo/bind-users">https://lists.isc.org/mailman/listinfo/bind-users</a> to unsubscribe from this list
bind-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:bind-users@lists.isc.org">bind-users@lists.isc.org</a>
<a class="moz-txt-link-freetext" href="https://lists.isc.org/mailman/listinfo/bind-users">https://lists.isc.org/mailman/listinfo/bind-users</a></pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Best regards
Sten Carlsen
No improvements come from shouting:
"MALE BOVINE MANURE!!!"
</pre>
</body>
</html>