Registered to FileNET RMI; in the wild it is a dynamically assigned ONC RPC program, not that product.
IANA assigns 32771 to FileNET RMI, part of the FileNet block spanning 32768–32777, and that product is rarely what you find. Historically this range is where Solaris and other System V hosts handed out ports to ONC RPC programs that registered with rpcbind, which is why Nmap names the port sometimes-rpc5. Nmap's comment records it as an RPC port on Solaris, most often rusersd. On Linux the same number falls inside the default ephemeral range (32768–60999), so it can equally be a container publish or an outbound socket. The only way to know is to ask rpcbind or fingerprint the listener.
Expose with care
Legacy ONC RPC services here (statd, rusersd, rquotad, sprayd, walld) authenticate weakly or not at all and have a long CVE history; keep them off the internet and reachable only from trusted NFS clients.
$ 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.