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2026-01-14: The Day the telnet Died (www.labs.greynoise.io)
submitted 9 months ago by to c/technology@lemmy.world
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On January 14, 2026, global telnet traffic observed by GreyNoise sensors fell off a cliff. A 59% sustained reduction, eighteen ASNs going completely silent, five countries vanishing from our data entirely. Six days later, CVE-2026-24061 dropped. Coincidence is one explanation.

The pattern points toward one or more North American Tier 1 transit providers implementing port 23 filtering

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[–] 13 points 9 months ago (1 child)

I used to debug POP3 issues by going through sessions one line at a time via telnet. Occasionally HTTP sessions too.

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