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TCP 9999

ProtocolTCP
Port9999
LabelsUrchin Web Analytics

Synopsis

  • TP-Link Kasa smart-home devices (e.g., HS100/HS110 plugs and Kasa bulbs) use TCP port 9999 for local control, with discovery often on UDP 9999.
  • Lantronix device servers such as XPort and UDS series provide a Telnet-based Setup Mode on TCP 9999 for configuration.
  • Aprelium Abyss Web Server’s administration console listens on TCP 9999 by default (e.g., http://127.0.0.1:9999).
  • Google Urchin Web Analytics (Urchin 5/6) used TCP 9999 for its web interface after installation.
  • The intentionally vulnerable “vulnserver” application listens on TCP 9999 and is commonly exploited in buffer-overflow training and demonstrations.

Observed activity

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