Unregistered; Nmap knows it only as another slot in the Solaris RPC dynamic range.
32779 falls in IANA's unassigned 32778–32800 block with no service name or reference. Nmap lists it as sometimes-rpc21 with the generic comment "Sometimes an RPC port on my Solaris box", meaning it observed RPC programs there often enough to name it but could not tie it to one program. It is also inside the Linux default ephemeral range (32768–60999). An open 32779 tells you a process bound a dynamic port, nothing more.
Expose with care
Unidentified dynamic service — query rpcbind or the host's socket table before you decide anything about exposure.
$ rpcinfo -p 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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Corrections or a missing port? Reply @rimrocksystems.