Interesting Snippets from 2021-09-19

• IP to ASN mapping - Team Cymru

  The DNS daemon is designed for rapid reverse lookups, much in the same way as RBL lookups are done. DNS has the added advantage of being cacheable and based on UDP so there is much less overhead.

• Diagnostic Tool: Link and Instructions – OpenDNS

  To provide diagnostic information for a Linux/Unix machine, please run the following commands and provide the results in your reply to the support ticket.

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