# WHATPORT(5510)

## NAME

port 5510 — Legacy RSA ACE/Server replica sync (unassigned at IANA) — Unassigned today; historically part of RSA ACE/Server's replica synchronisation block.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA lists 5508-5539 as unassigned, so 5510 has no current registration. Its historical use comes from RSA ACE/Server (later Authentication Manager), whose shipped services file allocated securidprop_00 through securidprop_10 across 5505-5515 for server-to-replica synchronisation, with 5510 serving replica 5. Outside a legacy SecurID deployment, an open 5510 is some application's own choice of port.

## EXPOSURE

**Do not expose.** If this is SecurID replication, it is authentication-infrastructure traffic between servers and belongs on an internal segment only.

## CHECK

```sh
sudo lsof -nP -iTCP:5510 -sTCP:LISTEN
```

## SEE ALSO

- docs — [RSA — annotated example of the ACE/Server services file](https://community.rsa.com/t5/securid-knowledge-base/correct-and-annotated-example-of-rsa-ace-server-services-file/ta-p/8600) (community.rsa.com)
- iana — [IANA port registry — 5510 (unassigned)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=5510) (iana.org)

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HTML: <https://whatport.net/5510/> · JSON: <https://whatport.net/5510.json> · full dataset: <https://whatport.net/ports.json>