Registered to Prima Designs Systems as "MPS Server"; effectively never seen.
IANA registers 6106 TCP and UDP as mpsserver, "MPS Server", assigned to Prima Designs Systems, and Unix /etc/services carries the same line. No public specification, client, or server implementation is available, so the registration is essentially the whole story. Anything listening here today is far more likely to be an unrelated application that picked a free port than an actual MPS Server.
Expose with care
Identify the process before judging it; an unattributed listener reachable from outside should be closed until someone can name it.
$ sudo lsof -nP -iTCP:6106 -sTCP:LISTENSeen 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.