TLD Survey:What Software?

• Decision Tree:

  • Responds to both queries => BIND 9

    • Including “REFUSED” & “NXDOMAIN”
  • Responds to first query only => BIND 4.9.3 - 8

    • Including “REFUSED” & “NXDOMAIN”
    • Responds with “SERVFAIL” for second query
  • Responds with “NOTIMPL” => BIND < 4.9.2 & NT4/Win2k DNS
  • Responds with “FORMERR” => tinydns 1.05
  • No response at all => tinydns < 1.05 or network problem

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