this post was submitted on 11 Feb 2026
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2026-01-14: The Day the telnet Died (www.labs.greynoise.io)
submitted 3 days ago by Bishma@discuss.tchncs.de to c/technology@lemmy.world
20 comments fedilink hide all child comments
 

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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[โ€“] Zwuzelmaus@feddit.org 22 points 3 days ago (1 children)

Telnet is still a quick and easy way to check if a certain port on a machine is listening.

But that's not what it was made for, of course. It's real meaning has gone down long ago.

[โ€“] deegeese@sopuli.xyz 16 points 3 days ago

Can do nc now which is more flexible for connectivity tests.