System is querying to Public Root Servers at midnight.

Solution Verified - Updated -

Issue

  • Network team can see DNS traffic going to public IPs at specific time like midnight

  • Network Team need to make sure no such requests are made from system.

  • Avoid unbound-anchor from making external network or public connections

  • Sample IP addresses which are being queried are [These are IPs of root DNS server]:

    199.7.83.42
    199.7.83.42
    192.58.128.30
    192.58.128.30
    199.7.83.42
    192.5.5.241
    192.5.5.241
    199.7.83.42
    

Environment

  • Red Hat Enterprise Linux
  • unbound-anchor

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