Transform Meta Info
|Display Name||To DNS Names in netblock [Reverse DNS]|
|Short Description||This Transform contacts Robtex (www.robtex.com) and asks it for any DNS Names that resolves to IP within this netblock.|
This Transform will speak to Serversniff and Robtex and ask them to give us all reverse DNS records they have for the supplied network.
It gets a bit messy - what happens when you have a class B network? As such the providers have limitations. Robtex wont return reverse DNS entries for networks larger than 2048 IPs (that's 4 class Cs) and Serversniff won't be impressed if you run a block larger than a class B. Keep in mind that you need to adjust your slider accordingly (if your slider is on the first notch and you reverse a class C you'll only get 12 entries back). Also - note that this information comes from a database - so it might not always be up to date. The transform can take a while to run - so be patient. It still beats doing it manually...