What is reverse DNS lookup? — OZONE Asylum, home of the Mad Scientists

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What is reverse DNS lookup?

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Your Text: Insert Slimies » Insert UBB Code » Close Last Tag \| All Tags UBB Help	- Reverse DNS lookup is the fact of checking an IP against a domain name server and being able to retrieve the corresponding domain name. This can only work if a "ptr" record exists for the concerned IP adress. It is used by some ISPs in a silly attempt at forcing mail sending servers to "authenticate": if your server's name can't be retrieved from your ip, you (supposedly) are a spammer... Which is technically very wrong: many servers do not allow reverse dns lookup for good reasons, and many spam servers do allow it Isps do this, very stupidly, to show they're doing something. _________________________ ->InI [small](Created by [internallink=1269]Emperor[/internallink] on 05-17-2004 17:40)[/small] Loading...
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