Hi All,
I wonder if we have any DNS guru's that might be able to help.
We have 3 dns servers for our domain, and for months we've been seeing a pretty constant number of dns queries per day. However, as of 1st Dec we started to see a sudden rise in the number of queries, going from a very consistent 20K per server per day to 50-100K per server per day. Two things are striking here - firstly the rise, but also the large variation in daily queries.
We have no idea what's caused this sudden increase. To note, it's not really an issue as we have no problem coping with the increased load so it's more a curiosity as to the reason.
We are not seeing any concomitant rise in traffic at the website nor mailing lists, we don't host multiple sub-domains, we are not aware of any high profile news articles linking our site (the /. effect), we didn't reset our TTL to a lower value on 1st Dec.
Any ideas or suggestions what might have caused this?


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