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Rev

setting TTL to a small value sounds good. Pity it is not 100%! what is the percentage do you estimate? above 80% or around 50% or blabla? I know that PC may have a local DNS cache, will that cache normally respect the TTL? thanks!
– misteryes
Commented May 29, 2013 at 1:05
@misteryes it's impossible to tell percentage, since ISPs often cache the value, meaning that it may be one client or a thousand. Again, what do you want to do? The specific actions you're asking about can't be done (because of caching), but you may be able to do what you want in a different way.
– Rich Homolka
Commented May 29, 2013 at 2:30
what I want to do is updated in my question
– misteryes
Commented May 29, 2013 at 12:05
@misteryes What you want to do is called "Name-based Virtual Hosting" and has already been done repeatedly in ways that are not terrible ideas.
– Shadur-don't-feed-the-AI
Commented Sep 11, 2014 at 9:16

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