NetBackup's VOPIE one-time-password authentication daemon, sitting directly above bpcd.
IANA registers 13783 as vopied, the "VOPIED Protocol", assigned alongside the rest of the Veritas NetBackup ports. VOPIE is NetBackup's legacy challenge-response scheme for authenticating a server to a client, a variation on the S/KEY style of one-time password, and vopied is the daemon that answers those exchanges on the client. It is almost always found next to bpcd on 13782 on the same host, because both ship with the NetBackup client. Newer NetBackup deployments moved authentication onto the vnetd (13724) and PBX paths, so a live vopied usually indicates an older client generation.
Do not expose
An authentication daemon for backup agents, and a legacy one at that. Backup management network only.
$ nmap -Pn -sV -p 13783 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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