# WHATPORT(5100)

## NAME

port 5100 — socalia — Registered as "Socalia service mux"; scanners still print the dead Chili!Soft ASP name admd.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA's current entry for 5100 is socalia, a service multiplexer registration with no public specification. Nmap's list carries the older label admd, the administration port of Chili!Soft ASP, a product discontinued long ago, and notes Yahoo pager traffic as another historical squatter. None of those are live software today, so treat 5100 as an unclaimed number in the 5100-5102 block and fingerprint whatever answers.

## EXPOSURE

**Expose with care.** No standard service means no default security posture. Find the owning process before allowing it through a firewall.

## CHECK

```sh
sudo lsof -nP -iTCP:5100 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA port registry — 5100 (socalia)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=5100) (iana.org)

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HTML: <https://whatport.net/5100/> · JSON: <https://whatport.net/5100.json> · full dataset: <https://whatport.net/ports.json>