Recently we move our wedding website application to ec2 servers.  Part of doing so meant updating DNS entries.  5 days after changing them, I’m still seeing traffic to the old servers…

Part of moving to ec2 required us to move to a 3rd party DNS solution.  We chose DynDNS.  Their offering is pretty good, but I’m less then impressed with their support.  [their response time is about 24 hours and when I asked why I'd still be getting traffic to the old IP and what I might do about it they basically said "that's not our problem"...]

Anyway – before changing hosts I set the DNS TTL to 20s. I was surprised to see traffic to the old IP a day later. On the second day I got worried. After a few more days I was even more so…

After looking through the logs a bit more it seems that almost all of the traffic in the last two days is coming from the IP 72.30.79.108 – which turns out to be one of yahoo’s crawlers…

So, Yahoo, if you read this, please make sure your crawlers respect DNS records… Otherwise you’re getting stale data…