Please note that not all DNS requests originate from a browser. You are mixing DNS and HTTP, so intercepting and changing DNS will only aggravate your non-browser users and won't produce the process flow you want, hijacking the users browser input and sending it off to a search engine.
I think the HTTP proxy idea is the best, turning all 4xx responses into search queries. But I think that this will confuse users much more than just setting their homepage to a search engine.
In reply to Re: DNS modification
by Corion
in thread DNS modification
by Wils
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