I'm trying to use NSLOOKUP on our Windows network to identify some PCs reported in our web filtering system (they're only reported by IP address) but it's not working - I get a "dnsserver.domain.local can't find X.X.X.X: Non-existent domain". (DNS server names and IP addresses have been changed to protect the innocent)
There are relevant reverse lookup zones for the ranges in question on the DNS server, although at my level of knowledge I'm not sure if they have been setup correctly.
As background my TCP/IP and DNS knowledge isn't great, but I know a bit at least.
Anyone know where to start troubleshooting?