# WHATPORT(8181)

## NAME

port 8181 — GlassFish HTTPS listener, Intermapper — The default HTTPS listener for GlassFish and Payara, and IANA's Intermapper port.

Protocol: TCP  
IANA: intermapper

## DESCRIPTION

Eclipse GlassFish ships an HTTPS listener on 8181 next to its HTTP listener on 8080 and the admin console on 4848; Payara inherits the same defaults. IANA registers 8181/tcp to intermapper, HelpSystems' network management system. In practice 8181 is also a common second HTTP port for OSGi containers and Java web stacks generally, so a listener here may speak TLS or plain HTTP depending on what put it there. Probe it both ways before concluding.

## EXPOSURE

**Expose with care.** If it is GlassFish, the interesting target is the admin console on 4848 next door; a default-certificate 8181 also gives you no identity assurance.

## CHECK

```sh
openssl s_client -connect TARGET:8181 </dev/null 2>/dev/null | openssl x509 -noout -subject -dates
```

## SEE ALSO

- docs — [Eclipse GlassFish Administration Guide (default HTTPS port 8181)](https://glassfish.org/docs/latest/administration-guide.html) (glassfish.org)
- iana — [IANA Service Name and Transport Protocol Port Number Registry — 8181](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=8181) (iana.org)

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