----- Original Message ----- > From: "Erik Levinson" <erik.levin...@uberflip.com>
> I'm having an unusual DNS problem and would appreciate feedback. > > For the zones in question, primary DNS is provided by GoDaddy and > secondary DNS by DNS Made Easy. Over a week ago we made changes to > several A records (including wildcards on two different zones), all > already having a TTL no greater than one hour. > > The new IPs on those A records have taken many millions of requests > since the changes. Occasionally, a small amount of traffic appears at > the old IPs that those A records had. This is HTTP traffic. Packet > captures of this traffic show various Host headers. I'm a touch surprised to find that no one has mentioned the facet of Windows OSs that requires "ipconfig /flushdns" in some such circumstances... Not only may *browsers* be caching DNS lookups without regard to TTLs, the *OS* might be doing it to you too, in circumstances I was never quite able to get a handle on. XP was known to do this, as late as SP3; I'm not sure about V or 7. Cheers, -- jra -- Jay R. Ashworth Baylink j...@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
