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最近我申請江蘇電信給我做了反向解析。<br>
用nslookup查詢可以由ip解析到域名﹐DNS用的是本地電信的。<br>
<br>
但是﹐我用www.DNSstuff.com網站檢測我的PTR記錄確查詢不到。<br>
查詢記錄如下﹕<br>
Warning: You seem to be doing a PTR lookup of non-standard hostname.<br>A PTR record lookup is normally done for a hostname in the format 1.0.0.127.in-addr.arpa.<br>
<br>
Searching for senyun.cn PTR record at d.root-servers.net Got referral to DNS4.CNNIC.NET.cn. [took 6 ms]<br>
Searching for senyun.cn PTR record at DNS4.CNNIC.NET.cn. Timed out. Trying again.<br>
Searching for senyun.cn PTR record at DNS4.CNNIC.NET.cn. Timed out. Trying again.<br>
Searching for senyun.cn PTR record at DNS4.CNNIC.NET.cn. Timed out. Trying again.<br>
Searching for senyun.cn PTR record at DNS2.CNNIC.NET.cn. Got referral to ns2.dns-diy.com. [took 387 ms]<br>
[Had to look up A record for ns2.dns-diy.com.; assume 200ms]<br>
Searching for senyun.cn PTR record at ns2.dns-diy.com. Reports no PTR records (NODATA type 2). 654ms.<br>
<br>
Answer: Does not exist.<br>
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Sorry, I could not continue.<br>
無法在CNNIC.NET.cn(中國網絡互聯信息中心)的DNS找到記錄。<br>
<br>
<br>
另外﹐我telnet到aol.com的mail server ,也提示找不到PTR記錄﹐這是怎么回事﹐不會是本地的上級DNS無記錄吧﹐逗我玩呢吧﹖﹖<br>
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