# WHATPORT(8402)

## NAME

port 8402 — abarsd (Commvault services) — Part of Commvault's 8400-8405 service block; IANA lists only the bare name abarsd.

Protocol: TCP  
IANA registry

## DESCRIPTION

The IANA registry gives 8402 the name abarsd with no description and no reference, from the same undated bulk registration as cvd on 8400. Commvault's firewall documentation lists "TCP 8402 — Commvault services" in the block it requires open between CommServe, MediaAgent and clients, together with 8400 (CVD), 8401 (Server Event Manager), 8403 (Commvault Firewall) and 8405. So a listener here almost always travels with 8400 on the same host; on its own it is unidentified.

## EXPOSURE

**Do not expose.** Backup-infrastructure plumbing with no reason to face the internet. Restrict it to the backup network alongside 8400.

## CHECK

```sh
sudo lsof -nP -iTCP:8402 -sTCP:LISTEN
```

## SEE ALSO

- docs — [Commvault — Firewall port requirements](https://documentation.commvault.com/11.41/software/firewall_port_requirements.html) (documentation.commvault.com)
- iana — [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)

---

HTML: <https://whatport.net/8402/> · JSON: <https://whatport.net/8402.json> · full dataset: <https://whatport.net/ports.json>