<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="KEYWORDS" content="Tests description" />
<meta name="robots" content="index,follow" />
<link rel="shortcut icon" href="favicon.ico" />
<title>Tests description - DNSdoctor</title>
<style type="text/css" media="screen,projection">/*<![CDATA[*/ @import "/skins/monobook/main.css"; /*]]>*/</style>
<link rel="stylesheet" type="text/css" media="print" href="commonPrint.css" />
<!--[if lt IE 5.5000]><style type="text/css">@import "/skins/monobook/IE50Fixes.css";</style><![endif]-->
<!--[if IE 5.5000]><style type="text/css">@import "/skins/monobook/IE55Fixes.css";</style><![endif]-->
<!--[if gte IE 6]><style type="text/css">@import "/skins/monobook/IE60Fixes.css";</style><![endif]-->
<!--[if IE]><script type="text/javascript" src="/skins/common/IEFixes.js"></script>
<meta http-equiv="imagetoolbar" content="no" /><![endif]-->
<script type="text/javascript" src="index.html%3Ftitle=-&action=raw&gen=js"></script> <script type="text/javascript" src="wikibits.js"></script>
<style type="text/css">/*<![CDATA[*/
@import "/?title=MediaWiki:Monobook.css&action=raw&ctype=text/css&smaxage=18000";
@import "/?title=-&action=raw&gen=css&maxage=18000";
/*]]>*/</style> </head>
<body class="ns-0">
<div id="globalWrapper">
<div id="column-content">
<div id="content">
<a name="top" id="top"></a>
<h1 class="firstHeading">Tests description</h1>
<div id="bodyContent">
<h3 id="siteSub">From DNSdoctor</h3>
<div id="contentSub"></div>
<!-- start content -->
<table id='toc' class='toc'><tr><td><div id='toctitle'><h2>Contents</h2></div>
<ul>
<li class='toclevel-1'><a href="Tests_description.1.html#Connectivity"><span class="tocnumber">1</span> <span class="toctext">Connectivity</span></a>
<ul>
<li class='toclevel-2'><a href="Tests_description.1.html#ICMP_answer"><span class="tocnumber">1.1</span> <span class="toctext">ICMP answer</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#UDP_connectivity"><span class="tocnumber">1.2</span> <span class="toctext">UDP connectivity</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#TCP_connectivity"><span class="tocnumber">1.3</span> <span class="toctext">TCP connectivity</span></a></li>
</ul>
</li>
<li class='toclevel-1'><a href="Tests_description.1.html#Root_servers"><span class="tocnumber">2</span> <span class="toctext">Root servers</span></a>
<ul>
<li class='toclevel-2'><a href="Tests_description.1.html#Root-servers_list_present"><span class="tocnumber">2.1</span> <span class="toctext">Root-servers list present</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Root-servers_list_identicall_to_ICANN"><span class="tocnumber">2.2</span> <span class="toctext">Root-servers list identicall to ICANN</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Root-servers_addresses_identical_to_ICANN"><span class="tocnumber">2.3</span> <span class="toctext">Root-servers addresses identical to ICANN</span></a></li>
</ul>
</li>
<li class='toclevel-1'><a href="Tests_description.1.html#SOA_.28Start_Of_Authority.29"><span class="tocnumber">3</span> <span class="toctext">SOA (Start Of Authority)</span></a>
<ul>
<li class='toclevel-2'><a href="Tests_description.1.html#SOA_record_present"><span class="tocnumber">3.1</span> <span class="toctext">SOA record present</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#SOA_authoritative_answer"><span class="tocnumber">3.2</span> <span class="toctext">SOA authoritative answer</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Misused_of_.27.40.27_character_in_contact_name"><span class="tocnumber">3.3</span> <span class="toctext">Misused of '@' character in contact name</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Illegal_characters_in_contact_name"><span class="tocnumber">3.4</span> <span class="toctext">Illegal characters in contact name</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Illegal_characters_in_master_name"><span class="tocnumber">3.5</span> <span class="toctext">Illegal characters in master name</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Serial_number_of_the_form_YYYYMMDDnn"><span class="tocnumber">3.6</span> <span class="toctext">Serial number of the form YYYYMMDDnn</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#.27expire.27_field_is_between_min_and_max"><span class="tocnumber">3.7</span> <span class="toctext">'expire' field is between min and max</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Coherence_between_SOA_and_ANY_records"><span class="tocnumber">3.8</span> <span class="toctext">Coherence between SOA and ANY records</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Coherence_of_the_serial_number_between_the_nameservers"><span class="tocnumber">3.9</span> <span class="toctext">Coherence of the serial number between the nameservers</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Excessive_drift_of_serial_with_the_primary_nameservers"><span class="tocnumber">3.10</span> <span class="toctext">Excessive drift of serial with the primary nameservers</span></a></li>
</ul>
</li>
<li class='toclevel-1'><a href="Tests_description.1.html#NS_records"><span class="tocnumber">4</span> <span class="toctext">NS records</span></a>
<ul>
<li class='toclevel-2'><a href="Tests_description.1.html#NS_records_present"><span class="tocnumber">4.1</span> <span class="toctext">NS records present</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#NS_authoritative_answer"><span class="tocnumber">4.2</span> <span class="toctext">NS authoritative answer</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#NS_name_has_a_valid_domain.2Fhostname_syntax"><span class="tocnumber">4.3</span> <span class="toctext">NS name has a valid domain/hostname syntax</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#NS_is_not_an_alias"><span class="tocnumber">4.4</span> <span class="toctext">NS is not an alias</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Coherence_between_NS_and_ANY_records"><span class="tocnumber">4.5</span> <span class="toctext">Coherence between NS and ANY records</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#NS_can_be_resolved"><span class="tocnumber">4.6</span> <span class="toctext">NS can be resolved</span></a></li>
</ul>
</li>
<li class='toclevel-1'><a href="Tests_description.1.html#MX_records"><span class="tocnumber">5</span> <span class="toctext">MX records</span></a>
<ul>
<li class='toclevel-2'><a href="Tests_description.1.html#MX_record_present"><span class="tocnumber">5.1</span> <span class="toctext">MX record present</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#MX_authoritative_answer"><span class="tocnumber">5.2</span> <span class="toctext">MX authoritative answer</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#MX_syntax_is_valid_for_a_hostname"><span class="tocnumber">5.3</span> <span class="toctext">MX syntax is valid for a hostname</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#MX_is_not_an_alias"><span class="tocnumber">5.4</span> <span class="toctext">MX is not an alias</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Absence_of_wildcard_MX"><span class="tocnumber">5.5</span> <span class="toctext">Absence of wildcard MX</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Coherence_between_MX_and_ANY_records"><span class="tocnumber">5.6</span> <span class="toctext">Coherence between MX and ANY records</span></a></li>
</ul>
</li>
<li class='toclevel-1'><a href="Tests_description.1.html#Loopback"><span class="tocnumber">6</span> <span class="toctext">Loopback</span></a>
<ul>
<li class='toclevel-2'><a href="Tests_description.1.html#Loopback_delegation"><span class="tocnumber">6.1</span> <span class="toctext">Loopback delegation</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Loopback_is_resolvable"><span class="tocnumber">6.2</span> <span class="toctext">Loopback is resolvable</span></a></li>
</ul>
</li>
<li class='toclevel-1'><a href="Tests_description.1.html#Mail"><span class="tocnumber">7</span> <span class="toctext">Mail</span></a>
<ul>
<li class='toclevel-2'><a href="Tests_description.1.html#Can_deliver_email_to_.27postmaster.27"><span class="tocnumber">7.1</span> <span class="toctext">Can deliver email to 'postmaster'</span></a></li>
<li class='toclevel-2'><a href="Tests_description.1.html#Can_deliver_email_to_.27hostmaster.27"><span class="tocnumber">7.2</span> <span class="toctext">Can deliver email to 'hostmaster'</span></a></li>
</ul>
</li>
</ul>
</td></tr></table>
<p><script type="text/javascript"> if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } </script>
</p>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=1" title="Tests description">edit</a>]</div><a name="Connectivity"></a><h1> Connectivity </h1>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=2" title="Tests description">edit</a>]</div><a name="ICMP_answer"></a><h2> ICMP answer </h2>
<dl><dt> name </dt><dd> icmp
</dd><dt> severity </dt><dd> warning (it is more an help to the diagnostic)
</dd><dt> description </dt><dd> Send an ICMP <i>echo request</i> to the nameserver and wait for a the <i>echo reply</i>.
</dd><dt> possible cause </dt><dd> The whole host is down or not reachable. Beware, that it could also be an extremist firewall blocking ICMP echo requests.
</dd><dt> how to reproduce </dt><dd>
</dd></dl>
<pre>ping ${hostip}
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=3" title="Tests description">edit</a>]</div><a name="UDP_connectivity"></a><h2> UDP connectivity </h2>
<dl><dt> name </dt><dd> udp
</dd><dt> severity </dt><dd> fatal
</dd><dt> reference </dt><dd>
</dd></dl>
<ul><li> <i>IETF RFC1035 (p.32 4.2. Transport)</i>
</li></ul>
<dl><dd>The DNS assumes that messages will be transmitted as datagrams or in a byte stream carried by a virtual circuit. While virtual circuits can be used for any DNS activity, datagrams are preferred for queries due to their lower overhead and better performance.
</dd><dt> description </dt><dd> Ask for ANY record of the tested zone through the use of UDP datagrams; whatever is the answer, if the server answer within 8 seconds to one of the 25 queries that we try during 5 seconds, the test is successful.
</dd><dt> possible cause </dt><dd> A server not responding generally means that the DNS daemon has not been started. It tends to happen a lot with IPv6, because peoples add AAAA records for their nameservers but forgot to start the service or don't have the IPv6 connectivity.
</dd><dt> how to reproduce </dt><dd>
</dd></dl>
<pre>dig @${hostip} ${domainname}
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=4" title="Tests description">edit</a>]</div><a name="TCP_connectivity"></a><h2> TCP connectivity </h2>
<dl><dt> name </dt><dd> tcp
</dd><dt> severity </dt><dd> fatal
</dd><dt> reference </dt><dd>
</dd></dl>
<ul><li> <i>IETF RFC1035 (p.32 4.2. Transport)</i>
</li></ul>
<dl><dd>The DNS assumes that messages will be transmitted as datagrams or in a byte stream carried by a virtual circuit. While virtual circuits can be used for any DNS activity, datagrams are preferred for queries due to their lower overhead and better performance.
</dd><dt> description </dt><dd> Ask for the ANY record of the tested zone through a TCP connection; whatever is the answer, if the server answer, the test is successful.
</dd><dt> possible cause </dt><dd> Typicall errors are "Connection refused", "Connection reset" or "Timeout", this is generally due to the presence of a misconfigured firewall disallowing connection on TCP port 53, or in some seldom case to the use of DNS daemon not listening on TCP.
</dd><dt> how to reproduce </dt><dd>
</dd></dl>
<pre>dig @${hostip} ${domainname} +vc
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=5" title="Tests description">edit</a>]</div><a name="Root_servers"></a><h1> Root servers </h1>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=6" title="Tests description">edit</a>]</div><a name="Root-servers_list_present"></a><h2> Root-servers list present </h2>
<dl><dt> name </dt><dd> root_servers
</dd><dt> how to reproduce </dt><dd>
</dd></dl>
<pre>dig @${hostip} . ns
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=7" title="Tests description">edit</a>]</div><a name="Root-servers_list_identicall_to_ICANN"></a><h2> Root-servers list identicall to ICANN </h2>
<dl><dt> name </dt><dd> root_servers_ns_vs_icann
</dd><dt> description </dt><dd> Ask the list of name servers delegating the root zone and compare it with the official one (established by ICANN) used by the root-servers ([a-m].root-servers.net), it is also possible to retrieve the list from <a href="ftp://ftp.internic.net/domain/named.root" class='external free' title="ftp://ftp.internic.net/domain/named.root" rel="nofollow">ftp://ftp.internic.net/domain/named.root</a>
</dd><dt> possible cause </dt><dd> The DNS server contains an outdated list of root-servers that need to be updated. Another possibility is that you have explicitly chosen to use an alternative root.
</dd><dt> how to reproduce </dt><dd> Compare answer sections for both of this output
</dd></dl>
<pre>dig @${hostip} . ns
dig @m.root-servers.net . ns
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=8" title="Tests description">edit</a>]</div><a name="Root-servers_addresses_identical_to_ICANN"></a><h2> Root-servers addresses identical to ICANN </h2>
<dl><dt> name </dt><dd> root_servers_ip_vs_icann
</dd><dt> description </dt><dd> Ask the IPv4 and IPv6 addresses for all of the root-servers and compare with the answers provided by one of the root-servers, it is also possible to retrieve the list of root-servers with their addresses from <a href="ftp://ftp.internic.net/domain/named.root" class='external free' title="ftp://ftp.internic.net/domain/named.root" rel="nofollow">ftp://ftp.internic.net/domain/named.root</a>
</dd><dt> possible cause </dt><dd> The DNS server contains an outdated list of root-servers that need to be updated. Another possibility is that you have explicitly chosen to use an alternative root.
</dd><dt> how to reproduce </dt><dd> Compare answer sections for record type <code>A</code> (ie: IPv4) and record type <code>AAAA</code> (ie: IPv6)
</dd></dl>
<pre>dig @${hostip} [a-m].root-servers.net a
dig m.root-servers.net [a-m].root-servers.net a
</pre>
<pre>dig @${hostip} [a-m].root-servers.net aaaa
dig m.root-servers.net [a-m].root-servers.net aaaa
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=9" title="Tests description">edit</a>]</div><a name="SOA_.28Start_Of_Authority.29"></a><h1> SOA (Start Of Authority) </h1>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=10" title="Tests description">edit</a>]</div><a name="SOA_record_present"></a><h2> SOA record present </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=11" title="Tests description">edit</a>]</div><a name="SOA_authoritative_answer"></a><h2> SOA authoritative answer </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=12" title="Tests description">edit</a>]</div><a name="Misused_of_.27.40.27_character_in_contact_name"></a><h2> Misused of '@' character in contact name </h2>
<dl><dt> name </dt><dd> soa_contact_sntx_at
</dd><dt> severity </dt><dd> fatal
</dd><dt> description </dt><dd> Ask for the <code>SOA</code>, the <code>rname</code> (responsible name) field, and check that it doesn't contain a '@'.
</dd><dt> possible cause </dt><dd> The <code>rname</code> that specifies the mailbox of the person responsible for the zone, has been encoded as if it was an email address. If you start from an email address, you must convert the '@' (at) into a '.' (dot), and protect the eventual '.' (dot) in the username with a '\' (backslash).
</dd><dt> how to reproduce </dt><dd>
</dd></dl>
<pre>dig @${hostip} ${domainname} soa
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=13" title="Tests description">edit</a>]</div><a name="Illegal_characters_in_contact_name"></a><h2> Illegal characters in contact name </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=14" title="Tests description">edit</a>]</div><a name="Illegal_characters_in_master_name"></a><h2> Illegal characters in master name </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=15" title="Tests description">edit</a>]</div><a name="Serial_number_of_the_form_YYYYMMDDnn"></a><h2> Serial number of the form YYYYMMDDnn </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=16" title="Tests description">edit</a>]</div><a name=".27expire.27_field_is_between_min_and_max"></a><h2> 'expire' field is between <i>min</i> and <i>max</i> </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=17" title="Tests description">edit</a>]</div><a name="Coherence_between_SOA_and_ANY_records"></a><h2> Coherence between SOA and ANY records </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=18" title="Tests description">edit</a>]</div><a name="Coherence_of_the_serial_number_between_the_nameservers"></a><h2> Coherence of the serial number between the nameservers </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=19" title="Tests description">edit</a>]</div><a name="Excessive_drift_of_serial_with_the_primary_nameservers"></a><h2> Excessive drift of serial with the primary nameservers </h2>
<dl><dt> name </dt><dd> soa_drift_serial
</dd><dt> severity </dt><dd> fatal
</dd><dt> description </dt><dd> Compare the serial number of the primary nameserver with the serial number of the secondary nameservers, the difference shouldn't exceed the specified threshold. Two thresholds are available the first (<code>soa:serial:drift_ymd</code>) is used when the serial use the YYYYMMDDnn format, the seconde (<code>soa:serial:drift</code>) otherwise.
</dd><dt> possible cause </dt><dd> The secondary nameserver don't synchronise anymore, this is generaly due to an obsolete master in the configuration of the secondary nameserver (ie: someone forgot to notify its secondary of the change).
</dd><dt> how to reproduce </dt><dd> Compare the results of the following command and look for the serial number
</dd></dl>
<pre>dig @ns1 soa ; dig @ns2 soa
</pre>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=20" title="Tests description">edit</a>]</div><a name="NS_records"></a><h1> NS records </h1>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=21" title="Tests description">edit</a>]</div><a name="NS_records_present"></a><h2> NS records present </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=22" title="Tests description">edit</a>]</div><a name="NS_authoritative_answer"></a><h2> NS authoritative answer </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=23" title="Tests description">edit</a>]</div><a name="NS_name_has_a_valid_domain.2Fhostname_syntax"></a><h2> NS name has a valid domain/hostname syntax </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=24" title="Tests description">edit</a>]</div><a name="NS_is_not_an_alias"></a><h2> NS is not an alias </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=25" title="Tests description">edit</a>]</div><a name="Coherence_between_NS_and_ANY_records"></a><h2> Coherence between NS and ANY records </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=26" title="Tests description">edit</a>]</div><a name="NS_can_be_resolved"></a><h2> NS can be resolved </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=27" title="Tests description">edit</a>]</div><a name="MX_records"></a><h1> MX records </h1>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=28" title="Tests description">edit</a>]</div><a name="MX_record_present"></a><h2> MX record present </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=29" title="Tests description">edit</a>]</div><a name="MX_authoritative_answer"></a><h2> MX authoritative answer </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=30" title="Tests description">edit</a>]</div><a name="MX_syntax_is_valid_for_a_hostname"></a><h2> MX syntax is valid for a hostname </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=31" title="Tests description">edit</a>]</div><a name="MX_is_not_an_alias"></a><h2> MX is not an alias </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=32" title="Tests description">edit</a>]</div><a name="Absence_of_wildcard_MX"></a><h2> Absence of wildcard MX </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=33" title="Tests description">edit</a>]</div><a name="Coherence_between_MX_and_ANY_records"></a><h2> Coherence between MX and ANY records </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=34" title="Tests description">edit</a>]</div><a name="Loopback"></a><h1> Loopback </h1>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=35" title="Tests description">edit</a>]</div><a name="Loopback_delegation"></a><h2> Loopback delegation </h2>
<dl><dt> name </dt><dd> loopback_delegation
</dd><dt> reference </dt><dd>
</dd></dl>
<ul><li> <i>IETF RFC1912 (p.13 4.1. Boot file setup)</i>
</li></ul>
<dl><dd>These are set up to either provide nameservice for "special" addresses, or to help eliminate accidental queries for broadcast or local address to be sent off to the root nameservers. All of these files will contain NS and SOA records just like the other zone files you maintain.
</dd><dt> possible cause </dt><dd> The zone has not been defined.
</dd><dt> how to reproduce </dt><dd>
</dd></dl>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=36" title="Tests description">edit</a>]</div><a name="Loopback_is_resolvable"></a><h2> Loopback is resolvable </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=37" title="Tests description">edit</a>]</div><a name="Mail"></a><h1> Mail </h1>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=38" title="Tests description">edit</a>]</div><a name="Can_deliver_email_to_.27postmaster.27"></a><h2> Can deliver email to 'postmaster' </h2>
<div class="editsection" style="float:right;margin-left:5px;">[<a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit&section=39" title="Tests description">edit</a>]</div><a name="Can_deliver_email_to_.27hostmaster.27"></a><h2> Can deliver email to 'hostmaster' </h2>
<!-- Saved in parser cache with key dnsdoctor_wiki:pcache:idhash:744-0!1!0!0!!en!2 and timestamp 20060212185314 -->
<div class="printfooter">
Retrieved from "<a href="http://www.dnsdoctor.org/Tests_description">http://www.dnsdoctor.org/Tests_description</a>"</div>
<div id="catlinks"><p class='catlinks'><a href="http://www.dnsdoctor.org/?title=Special:Categories&article=Tests_description" title="Special:Categories">Categories</a>: <a href="http://www.dnsdoctor.org/Category:Documentation" title="Category:Documentation">Documentation</a> | <a href="http://www.dnsdoctor.org/?title=Category:Tests&action=edit" class="new" title="Category:Tests">Tests</a></p></div> <!-- end content -->
<div class="visualClear"></div>
</div>
</div>
</div>
<div id="column-one">
<div id="p-cactions" class="portlet">
<h5>Views</h5>
<ul>
<li id="ca-nstab-main"
class="selected" ><a href="http://www.dnsdoctor.org/Tests_description">Article</a></li><li id="ca-talk"
><a href="http://www.dnsdoctor.org/Talk:Tests_description">Discussion</a></li><li id="ca-edit"
><a href="http://www.dnsdoctor.org/?title=Tests_description&action=edit">Edit</a></li><li id="ca-history"
><a href="http://www.dnsdoctor.org/?title=Tests_description&action=history">History</a></li> </ul>
</div>
<div class="portlet" id="p-personal">
<h5>Personal tools</h5>
<div class="pBody">
<ul>
<li id="pt-login"><a href="http://www.dnsdoctor.org/?title=Special:Userlogin&returnto=Tests_description">Create an account or log in</a></li> </ul>
</div>
</div>
<div class="portlet" id="p-logo">
<a style="background-image: url(/images/docteur4.png);"
href="http://www.dnsdoctor.org/Main_Page"
title="Main Page"></a>
</div>
<script type="text/javascript"> if (window.isMSIE55) fixalpha(); </script>
<div class='portlet' id='p-navigation'>
<h5>Navigation</h5>
<div class='pBody'>
<ul>
<li id="n-DNSdoctor"><a href="http://www.dnsdoctor.org/DNSdoctor">DNSdoctor</a></li>
<li id="n-portal"><a href="http://www.dnsdoctor.org/DNSdoctor:Community_Portal">Community portal</a></li>
<li id="n-currentevents"><a href="http://www.dnsdoctor.org/Current_events">Current events</a></li>
<li id="n-Screenshots"><a href="http://www.dnsdoctor.org/Screenshots">Screenshots</a></li>
<li id="n-Documentation"><a href="http://www.dnsdoctor.org/Documentation">Documentation</a></li>
<li id="n-Download"><a href="http://www.dnsdoctor.org/Download">Download</a></li>
<li id="n-Releases"><a href="http://www.dnsdoctor.org/Releases">Releases</a></li>
<li id="n-Resources"><a href="http://www.dnsdoctor.org/Resources">Resources</a></li>
<li id="n-Roadmap"><a href="http://www.dnsdoctor.org/Roadmap">Roadmap</a></li>
<li id="n-CVS"><a href="http://www.dnsdoctor.org/CVS">CVS</a></li>
<li id="n-Bugs"><a href="http://www.dnsdoctor.org/Bugs">Bugs</a></li>
<li id="n-History/Credits"><a href="http://www.dnsdoctor.org/History/Credits">History/Credits</a></li>
</ul>
</div>
</div>
<div id="p-search" class="portlet">
<h5><label for="searchInput">Search</label></h5>
<div class="pBody">
<form name="searchform" action="http://www.dnsdoctor.org/Special:Search" id="searchform">
<input id="searchInput" name="search" type="text"
accesskey="f" value="" />
<input type='submit' name="go" class="searchButton" id="searchGoButton"
value="Go"
/> <input type='submit' name="fulltext"
class="searchButton"
value="Search" />
</form>
</div>
</div>
<div class="portlet" id="p-tb">
<h5>Toolbox</h5>
<div class="pBody">
<ul>
<li id="t-whatlinkshere"><a href="http://www.dnsdoctor.org/Special:Whatlinkshere/Tests_description">What links here</a></li>
<li id="t-recentchangeslinked"><a href="http://www.dnsdoctor.org/Special:Recentchangeslinked/Tests_description">Related changes</a></li>
<li id="t-specialpages"><a href="http://www.dnsdoctor.org/Special:Specialpages">Special pages</a></li> <li id="t-print"><a href="http://www.dnsdoctor.org/?title=Tests_description&printable=yes">Printable version</a></li>
</ul>
</div>
</div>
</div><!-- end of the left (by default at least) column -->
<div class="visualClear"></div>
<div id="footer">
<div id="f-poweredbyico"><a href="http://www.mediawiki.org/"><img src="poweredby_mediawiki_88x31.png" alt="MediaWiki" /></a></div> <ul id="f-list">
<li id="f-lastmod"> This page was last modified 20:07, 21 April 2005.</li> <li id="f-viewcount">This page has been accessed 1,227 times.</li> <li id="f-about"><a href="http://www.dnsdoctor.org/DNSdoctor:About" title="DNSdoctor:About">About DNSdoctor</a></li> <li id="f-disclaimer"><a href="http://www.dnsdoctor.org/DNSdoctor:General_disclaimer" title="DNSdoctor:General disclaimer">Disclaimers</a></li> </ul>
</div>
</div>
<!-- Served by www.dnsdoctor.org in 0.36 secs. --> </body>
</html>
distrib
>
Mandriva
>
2010.0
>
i586
>
media
>
contrib-release
>
by-pkgid
>
a6aeef6569cbf8004b7d8b8f7109129c
>
files
>
156
