DNS Resolver(s) Tested:

1. 101.100.146.155 (101-100-146-155.myrepublic.co.nz) appears to have GREAT source port randomness and GREAT transaction ID randomness.

Test time: 2021-05-02 10:56:43 UTC

Note that standard deviation is usually, but not always, a good indicator of randomness. Your brain is a better detector of randomness, so be sure to take a look at the scatter plots below. If you see patterns (such as straight lines), the values are probably less random than reported.

101.100.146.155 Source Port Randomness: GREAT

Number of samples:	26
Unique ports:	26
Range:	1680 - 54945
Modified Standard Deviation:	17397
Bits of Randomness:	16
Values Seen:	54336 40908 48298 7876 36065 50547 23017 2240 17906 33949 28931 17434 53500 36656 30938 35531 20048 1680 22421 37968 54207 4038 29605 54945 51841 8911

101.100.146.155 Transaction ID Randomness: GREAT

Number of samples:	26
Unique txids:	26
Range:	729 - 64782
Modified Standard Deviation:	19984
Bits of Randomness:	16
Values Seen:	729 15188 14910 9512 27109 43450 50105 17291 9097 35623 52073 18356 49309 20166 9910 12827 17227 5326 55551 59888 64782 51365 8808 45609 12045 9901

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See CERT VU #800113 for information on the DNS cache poisoning vulnerability.

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