{
  "port": 13783,
  "protocol": "both",
  "service": "vopied (NetBackup)",
  "oneLiner": "NetBackup's VOPIE one-time-password authentication daemon, sitting directly above `bpcd`.",
  "whatItIs": "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.",
  "exposure": {
    "verdict": "never",
    "note": "An authentication daemon for backup agents, and a legacy one at that. Backup management network only."
  },
  "checkCommand": "nmap -Pn -sV -p 13783 TARGET",
  "links": [
    {
      "title": "IANA port registry — 13783 (vopied)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=13783",
      "kind": "iana"
    }
  ]
}