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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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dnsmon
- Monitor DNS servers from many places
- Independent and Objective
- Intuitive Graphical Presentation
dnsmon DNS Server Monitoring Daniel Karrenberg - - PowerPoint PPT Presentation
dnsmon DNS Server Monitoring Daniel Karrenberg - - PowerPoint PPT Presentation
dnsmon DNS Server Monitoring Daniel Karrenberg <daniel.karrenberg@ripe.net> 1 dnsmon Monitor DNS servers from many places Independent and Objective Intuitive Graphical Presentation 2 Daniel Karrenberg . ccTLD Sofia
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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dnsmon Probe Locations
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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dnsmon Probe Locations
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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Why Measure This Way?
- There are lots of bad measurements out there!
– Ping - what does it measure?? – From single locations …
- People (press, regulators) use them!
- Better Measurements are Needed
– From multiple points – Real DNS traffic
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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Single Point Measurement
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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In Context
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In Context
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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How to Read the Graphs
- Server View
– shows quality of service provided by the server to all probes
- Domain View
– summarises quality of service provided by all servers serving a domain
- (Probe View)
– shows quality of service provided by all servers at a particular probe location
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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What is Measured
- Real DNS queries
- Poisson distributed, ~60/hour/server/probe
- From 60+ probes around the world
- Response time
- Server instance ID (anycast, load balancing)
- SOA version number
- Server software version
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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What is Not Measured
- DNS queries used in actual name resolution
- Total DNS service quality, e.g. ‘user experience’
- global service quality: 60+ points, RIPE region bias
- Effects that last less than about a minute
But still very comprehensive measurements!
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Daniel Karrenberg . ccTLD Sofia October 2006 . http://www.ripe.net
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Some More Examples
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