SCO Desktop Administration Server — the companion to 616 on the same extinct Unix line.
IANA registers TCP and UDP 617 as "sco-dtmgr", the SCO Desktop Administration Server, part of the same block of SCO administrative services as sco-sysmgr on 616. Like its neighbour it belongs to SCO OpenServer/UnixWare systems that have been out of general use for many years. There is no current documentation for the wire protocol and no maintained client, so an open 617 is worth fingerprinting rather than assuming.
Do not expose
An administrative service on unsupported legacy Unix — internal networks only, and preferably not at all.
$ nc -vz -w 3 TARGET 617Seen 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.