Part of the 3322-3325 Active Networks block — a registration with no deployed protocol behind it.
Port 3323 falls inside IANA's active-net range 3322-3325, registered to Bob Braden for DARPA's Active Networks research. The block was reserved for experimental active-networking software; no RFC defines it and no widely used implementation claims it, so there is no wire format to describe. Every port in the range carries the same single registry line and nothing else. An open 3323 is therefore an unknown service wearing a borrowed name.
Expose with care
Nothing standard should be here — identify the listener by its banner before deciding whether the port belongs open.
$ nc -vz TARGET 3323Seen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.