Part of Commvault's 8400-8405 service block; IANA lists only the bare name abarsd.
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.
Do not expose
Backup-infrastructure plumbing with no reason to face the internet. Restrict it to the backup network alongside 8400.
$ sudo lsof -nP -iTCP:8402 -sTCP:LISTENSeen 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.