反向解析配置的命令[root@L ~]# vi /etc/named.rfc1912.zoneszone "50.100.168.192.in-addr.arpa" IN{ type master; file "baidu.com.ptr"; allow-update{none;};};[root@DNS ~]# vi /var/named/baidu.com.ptr$TTL 1D@ IN SOA baidu.com. rname.invalid. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum NS http://www.baidu.com/. A 192.168.100.5050 PTR http://www.baidu.com/.测试结果如下：[root@Client ~]# nslookup http://www.baidu.com/Server: 192.168.100.3Address: 192.168.100.3#53

Name: http://www.baidu.com/Address: 192.168.100.50Name: http://www.baidu.com/Address: ::1[root@Client ~]# nslookup 192.168.100.50** server can't find 50.100.168.192.in-addr.arpa.: NXDOMAIN请问这是什么原因造成的呢？