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I am having DNS server service running on Windows 2016 Server Primary Domain controller. I have an additional domain smtw.in configured:

enter image description here

server config 2 The PDC is the primary server for the domain.

I have a host sfw3.smtw.in configured with an A record as follows:

host info in dns

Now, when I run nslookup query from the PDC itself, I am getting the correct result as follows: server nslookup

But when I run nslookup from a Win 11 Pro domain joined laptop, I am getting this empty result - only name is returned, no IP address: client error

What could be wrong? I have tried restarting the PDC server, client etc. I have flushed cache, did 'Update Server data files' etc. but still the host is not resolving.

If I try to create some new hostname in the same zone, for example sfw2.smtw.in and try to resolve from the same client, it works, as below: another host

Why? Please help.

Lakshmi Anand K
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  • Are you getting that same result when pointed at the other AD DNS servers in the domain? What about when testing from other domain clients? Does a ping or traceroute resolve the hostname to an IP? – twconnell Jul 27 '23 at 22:38
  • @twconnell All other host names are resolving properly. I tested from other domain clients, I am getting the correct response. Looks like an issue from this laptop only. Ping and tracert could not resolve host. – Lakshmi Anand K Jul 29 '23 at 02:09
  • Update: Using wireshark, I find that nslookup is producing two queries: Standard A query for sfw3.smtw.in.sr___os.local and another AAAA query for the same hostname (sr___os.local is domain name of my AD network). OTOH a search for sfw2.smtw.in produces 4 queries: A and AAAA of sfw2.smtw.in.sr___os.local which fails, A and AAAA of sfw2.smtw.in. The query A for sfw2.smtw.in succeeds. Why does nslookup not search for sfw3.smtw.in alone and instead adds domain's "sr____os.local"? – Lakshmi Anand K Jul 29 '23 at 03:16
  • if I add an entry in c:\windows\system32\drivers\etc\hosts file for sfw3.smtw.in, it resolves properly thereafter. but why?.... – Lakshmi Anand K Jul 29 '23 at 03:19
  • Does the laptop having the issue have any non-standard DNS suffixes configured? – twconnell Jul 29 '23 at 22:58

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