Registered as FPO-FNS; no public specification, and no reliable modern sighting.
IANA assigns 1066 to fpo-fns, "FPO-FNS", a vendor registration with no published protocol documentation. Nmap sees it on about 0.19% of scanned hosts, which is typical background for this block and does not imply the registered service is what answered. Older port lists sometimes attach trojan names to ports in the 1000-1100 range; those attributions are undocumented folklore and are not repeated here. Identify the listener directly instead.
Expose with care
Unknown service. Fingerprint the listener; nothing about this registration argues for exposing it.
$ nmap -Pn -sV -p 1066 TARGETSeen 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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