DNS Resolver(s) Tested:

  1. 216.98.128.132 (nscache1.cari.net) appears to have GREAT source port randomness and GREAT transaction ID randomness.
  2. 216.98.128.131 (nscache2.cari.net) appears to have GREAT source port randomness and GREAT transaction ID randomness.

Test time: 2008-07-26 07:10:48 UTC


216.98.128.132 Source Port Randomness: GREAT

Number of samples: 33
Unique ports: 33
Range: 4803 - 65038
Modified Standard Deviation: 17326
Bits of Randomness: 16
Values Seen: 7537 7756 38622 31587 32659 40709 6803 7466 55827 65038 37171 44298 36930 8437 35993 23051 7745 26228 4803 19866 51881 30851 33978 42614 36397 61705 58547 21867 33957 47142 49914 36509 16321

216.98.128.132 Transaction ID Randomness: GREAT

Number of samples: 33
Unique txids: 33
Range: 2281 - 65071
Modified Standard Deviation: 18515
Bits of Randomness: 16
Values Seen: 47802 4736 57596 14485 14707 34654 32654 58756 19158 28994 11729 31176 2281 60787 65071 17347 44396 6617 19498 29023 43317 60330 18074 27896 64299 43117 51361 14533 40744 25761 32249 51135 39412

216.98.128.131 Source Port Randomness: GREAT

Number of samples: 32
Unique ports: 32
Range: 1338 - 61136
Modified Standard Deviation: 17747
Bits of Randomness: 16
Values Seen: 16271 4557 56374 39622 61004 47964 23674 44923 49325 40960 31028 22566 9835 48970 37298 4440 28750 38592 22384 37803 30300 61136 19488 10698 28525 49643 1338 11727 36511 34774 7867 60551

216.98.128.131 Transaction ID Randomness: GREAT

Number of samples: 32
Unique txids: 32
Range: 1921 - 63802
Modified Standard Deviation: 19266
Bits of Randomness: 16
Values Seen: 5365 40003 6946 29695 57591 1921 6615 5639 63802 5653 56201 61265 27406 43036 29514 46406 24153 33625 44217 14983 40617 62061 50836 25085 48985 48100 42723 18366 21043 44020 34308 61743

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

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