怎么不能反向解析域名？

devel

[root@localhost log]# nslookup www.xlzx.com
Note:  nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead.  Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
Server:         202.103.229.40
Address:        202.103.229.40#53

Non-authoritative answer:
Name:   www.xlzx.com
Address: 218.5.76.230

[root@localhost log]# nslookup 218.5.76.230
Note:  nslookup is deprecated and may be removed from future releases.
Consider using the `dig' or `host' programs instead.  Run nslookup with
the `-sil[ent]' option to prevent this message from appearing.
Server:         202.103.224.68
Address:        202.103.224.68#53

** server can't find 230.76.5.218.in-addr.arpa: SERVFAIL

[root@localhost log]#


  help me ~~~~~~~~~~~~

Glue

那是因为DNS服务器202.103.229.40本身不支持反向查询。