TCP 2103
Synopsis
- TCP port 2103 is assigned to the Zephyr Notification Service (Project Athena), used in campus messaging systems historically deployed at institutions like MIT and CMU.
- In practice, Zephyr servers/clients (e.g., the Zephyr client tools and the BarnOwl/Zephyr client on Unix systems) operate across ports 2102–2104, with 2103 used by the service’s management/client component alongside UDP in some deployments.
Observed activity
Last 30 days
Detailed chart