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TCP 9909

ProtocolTCP
Port9909
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Synopsis

  • Greyware Domain Time II uses TCP 9909 (and UDP 9909) for its proprietary DT2 time-synchronization and management/control traffic between Domain Time II Server, Client, and Manager/Monitor components.
  • IANA lists 9909/tcp as “domaintime” for this product, and Greyware’s deployment guides instruct opening TCP 9909 in firewalls for inter-host time requests, status, and remote management.
  • Example: In a Windows enterprise using Domain Time II, the Domain Time II Manager connects over TCP 9909 to Domain Time II Client/Server services on domain controllers and member servers to configure, monitor, and synchronize time.

Observed activity

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