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Gnu plot visualization showing the distribution of src port usage. Biggest peak at ~1024. Also a lower peak at around ~49152. y-axis goes to over 100,000. x-axis goes from 0 to 65535 (but drawn to 10,000).

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Gnu plot visualization showing the distribution of src port usage. Biggest peak at ~1024. Also a lower peak at around ~49152. y-axis goes to over 100,000. x-axis goes from 0 to 65535 (but drawn to 10,000).
https://media.infosec.exchange/infosec.exchange/media_attachments/files/114/156/627/485/796/796/original/e9443abd682f454e.png

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John Kristoff (jtk@infosec.exchange)'s status on Friday, 14-Mar-2025 09:08:15 JST John Kristoff

#ThrowbackThursday Here is a ~20 year old plot showing the frequency distribution of client source port usage at an edu #DNS resolver. Notice how the most common ports started at around 1024? That was Microsoft Windows. This picture should look a lot different if I were to redraw this today.

In conversation about a month ago from infosec.exchange permalink