re:我的这个什么意思？有戏吗？另外，我自...
我的这个什么意思？有戏吗？
另外，我自己在内网搞了一个dns，解释内网的ip，能把外网也做进来吗？
Reverse DNS for 221.136.81.89
Generated by www.DNSstuff.com
Country: CHINA
Preparation:
The reverse DNS entry for an IP is found by reversing the IP, adding it to "in-addr.arpa", and looking up the PTR record.
So, the reverse DNS entry for 221.136.81.89 is found by looking up the PTR record for
89.81.136.221.in-addr.arpa.
All DNS requests start by asking the root servers, and they let us know what to do next.
See How Reverse DNS Lookups Work for more information.
How I am searching:
Asking d.root-servers.net for 89.81.136.221.in-addr.arpa PTR record:
d.root-servers.net says to go to NS4.APNIC.NET. (zone: 221.in-addr.arpa.)
Asking NS4.APNIC.NET. for 89.81.136.221.in-addr.arpa PTR record:
ns4.apnic.net says to go to second1.nbip.com. (zone: 136.221.in-addr.arpa.)
Asking second1.nbip.com. for 89.81.136.221.in-addr.arpa PTR record: Reports that no PTR records exist.
Answer:
No PTR records exist for 221.136.81.89. [Neg TTL=3600 seconds]
Details:
second1.nbip.com. (an authoritative nameserver for 136.221.in-addr.arpa., which is in charge of the reverse DNS for 221.136.81.89)
says that there are no PTR records for 221.136.81.89.
To get reverse DNS set up for 221.136.81.89, you need to speak to your Internet provider. You could also
check with admin@nbip.net., who is in charge of the 136.221.in-addr.arpa. zone.
Note that all Internet accessible hosts are expected to have a reverse DNS entry (per RFC1912 2.1),
and many mailservers (such as AOL) will likely block E-mail from mailservers with no reverse DNS entry.
To see the reverse DNS traversal, to make sure that all DNS servers are reporting the correct results, you can Click Here.
