dnsreport.com给出的域名FAIL报告，但不明白该怎样完善？

emilysun

域名检查报告,,,有FAIL,但不明白该怎样修改?<br>
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用DNS report检查我们的域名后，得到以下FAIL报告：<br>
(1)NS——Missing nameservers 2，内容如下：<br>
ERROR: One or more of the nameservers listed at the parent servers are not listed as NS records at your nameservers. The problem NS records are:<br>
ns1.dns-diy.com.<br>
ns2.dns-diy.com.<br>
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（2）SOA——SOA MNAME Check，内容如下：<br>
ERROR: Your SOA (Start of Authority) record states that your master (primary) name server is: . However, that is not a valid domain name!<br>
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（3）SOA——SOA MINIMUM TTL value，内容如下：<br>
WARNING: Your SOA MINIMUM TTL is : 5 seconds. This seems very low (unless you are just about to update your DNS). You should consider increasing this value to somewhere between 3600 and 10800. RFC2308 suggests a value of 1-3 hours. This value used to determine the default (technically, minimum) TTL (time-to-live) for DNS entries, but now is used for negative caching.<br>
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（4）MX——Reverse DNS entries for MX records，内容如下：<br>
ERROR: The IP of one or more of your mail server(s) have no reverse DNS (PTR) entries (if you see "Timeout" below, it may mean that your DNS servers did not respond fast enough). RFC1912 2.1 says you should have a reverse DNS for all your mail servers. It is strongly urged that you have them, as many mailservers will not accept mail from mailservers with no reverse DNS entry. You can double-check using the 'Reverse DNS Lookup' tool at the DNSstuff site (it contacts your servers in real time; the reverse DNS lookups in the DNS report use our local caching DNS server). The problem MX records are:<br>
202.30.224.221.in-addr.arpa [No reverse DNS entry (rcode: 3 ancount: 0) (check it)]<br>
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请教各位，以上这些FAIL该怎样修改呢？ <br>