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Level 7

Impact of DNS resolution on Netflow

We are thinking about trying NTA in our lab. One of our team members brought up a good point and I would like to ask the same question here.

We are concerned that the reverse IP lookups by NTA to enrich Netflow data may affect the performance of our internal DNS server so can someone please explain how this mechanism works. Is the resolution performed for each flow during processing and recorded in the database? Does NTA send DNS queries to the server for every single flow?

Thanks

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