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I am looking for a generic way to download (multiple) DNS blacklists. The reason is that I would like to cache them locally for faster lookup. The lookup is not for an MXer, but for a log analysis tool. This tool will dedup IPs, so I will lookup each IP only once - thus I asume that DNS caching won't help much.

Some blacklists offer downloading, but that seems to be specific to the list. Of course I could just query each blacklist for all possible IPv4 addresses and use the results to build a unified local list - however that seems awefully inefficient, and will probably get me on some other blacklist :)

So is there a generic method for dns blacklist download?

Isaac
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