SANE's network scanner daemon — remote access to a scanner, in cleartext.
IANA registered 6566 as sane-port, the SANE Control Port, in 2002. saned is the daemon from the SANE project that lets other machines drive a locally attached scanner over the network; a client connects, names a backend and device, and pulls image data back. Access control is by host list plus an optional user list, and the protocol itself is unencrypted. You see it on Linux print/scan servers and on multifunction-device host machines.
Do not expose
Cleartext protocol with host-list access control and a long history of parsing bugs in the backends it fronts. Keep it on a trusted LAN segment, never on a public IP.
$ nc -vz TARGET 6566Seen 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.