1) 首先您要知道这个IP的反向域名解析是由哪台DNS服务器负责的:您可以用这个网页查询反向域名解析信息 http://www.dnsstuff.com/tools/ptr.ch?ip=219.147.9.106
Location: China [City: Shandong, Shandong]
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Answer:
No PTR records exist for 219.147.9.106. [Neg TTL=3600 seconds]
(还没有设置反向域名解析)
Details:
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To get reverse DNS set up for 219.147.9.106, you need to speak to your Internet provider. You could also
check with root@dns1.ctnt.com.cn., who is in charge of the 9.147.219.in-addr.arpa. zone.
大概意思是您需要跟您的isp上网服务商联系,或者咨询root@dns1.ctnt.com.cn,dns1.ctnt.com.cn直接负责219.147.9.106的反向域名解析。