On Mon, Jun 9, 2014 at 11:31 PM, Richard Doyle <lists...@islandnetworks.com> wrote:
> A caching whois client (jwhois, for example) can significantly reduce > the volume of queries. > You will need to query potentially hundreds or thousands of domains *per day* - mostly throw away domains from spammers. 1) What are the typical rate limits on public whois servers? 2) How to protect against attackers sending random non-existant domain names your way, thus ensuring you hit rate limites early? 3) How to parse the myriads of formats sent by whois servers? 4) How do you handle TLDs which do not publish registration dates, like eg .de? (At least they did not last time I checked.) Whois is not a feasible data source. -- Matthias
