Nslookup--server:unkonwn

when run the nslookup command in the CMD windows,DNS server cannot display it's host name.

such as :

server:unkonwn

ip address:192.168.1.13

The real cause is that DNS server has never configurated the PTR record for it's host name.

so we need to add it into the reserved zone.

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原文地址：https://www.cnblogs.com/yongdaiblog-201409/p/6798850.html