I have been using the below command to determine if a domain is
registered. I use this for an internal audit of what clients have
come and gone, and what DNS records I need to clean up.
dig example.com NS +trace -4 @4.2.2.1 | grep -i ns1.example.com
I run it also with ns2.example.com in the grep to make certain my
primary and secondary are listed.
My current trouble is that I am getting intermittent failures if the
domain is not a tld of .com, .net, .org.
$dig customtruckgraphics.us NS +trace -4 @4.2.2.1 +short
NS F.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS M.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS G.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS E.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS D.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS L.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS C.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS K.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS I.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS J.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS A.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS B.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
NS H.ROOT-SERVERS.NET. from server 4.2.2.1 in 19 ms.
dig: couldn't get address for 'J.GTLD.BIZ': not found
Can someone explain to me what is happening here, and also, provide a
suggestion on how to best test for the conditions I am after?
--
Scott * If you contact me off list replace talklists@ with scott@ *
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