DNS look up against a specific DNS provider

[byte.bucket at 4a44.com (byte.bucket at 4a44.com)]

> Does anyone know a way to specify a reverse DNS look up against a specific
> DNS provider? I don't want to use the DNS that is authoritive for  the
> given
> IP range. For example, look up all of the IPs at my org to see if any are
> mapped to some host name at DYNDNS? Some bot nets use these services for
> naming, so I thought this might be useful.
>
> Adrian
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> Pauldotcom at mail.pauldotcom.com
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> Main Web Site: http://pauldotcom.com

Try one of the following from your favorite *nix variant:

$  dig @{server you want to query} -x {ip address} +short +norecurse

or

$ host -r {ip address} {server you want to query}



Windows nslookup is kind of pathetic but I believe you can do the same
with it as follows:

C:\> nslookup -norecurse {ip address} {server you want to query}

-- 
byte_bucket