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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Impact of MS SQL Worm on DNS Root Name Service on 25.1.2003
THe RIPE NCC monitors response times to DNS queries of all root server addresses from ~60 points worldwide. Most of these points are within the RIPE region. 2 of the 13 server addresses (B&G) showed noticable degradation of response times to DNS queries across all measuring points. The other 11 server addresses awere *not* measurably affected. For the two servers that were affected, the data suggests that the servers themselves remained healthy during the event but that network infrastructure relatively close to them was affected. For B this lasted roughly from 0530(UTC) to 0630 and again shortly around 0730. For G it lasted from 0530 to roughly 1030. My conclusion is, that any degradation in DNS root name service that people have seen was due to Internet infrastructure problems between themselves and the servers. For only two of the thirteen server addresses these problems have been close enough to them to cause service degradation across all of our measurement points. A further tentative conclusion is that this data (again) supports the case for distributing root service across the Internet using IP anycasting. We expect to present a more detailed analysis at the RIPE meeting this week. Daniel
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