Threat Level: green Handler on Duty: Jan Kopriva

SANS ISC: Upswing in port 23/TCP scanning InfoSec Handlers Diary Blog


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Upswing in port 23/TCP scanning

Published: 2010-06-01
Last Updated: 2011-01-30 04:33:06 UTC
by Adrien de Beaupre (Version: 1)
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Reader Tom wrote in that he has noticed an upswing of scanning for port 23/TCP to a honeypot system. They are completing the 3 way handshake, then sending a FIN to shut it down. Dshield data confirms that others are seeing the same. Dshield port 23 graph Let us know if you are seeing anything interesting at our contact us page.

Cheers,
Adrien de Beaupré
Intru-shun.ca Inc.

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