# WHATPORT(13783)

## NAME

port 13783 — vopied (NetBackup) — NetBackup's VOPIE one-time-password authentication daemon, sitting directly above `bpcd`.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

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

**Do not expose.** An authentication daemon for backup agents, and a legacy one at that. Backup management network only.

## CHECK

```sh
nmap -Pn -sV -p 13783 TARGET
```

## SEE ALSO

- iana — [IANA port registry — 13783 (vopied)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=13783) (iana.org)

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