# WHATPORT(1055)

## NAME

port 1055 — ANSYS License Manager (FlexNet) — ANSYS's FlexNet license server — the lmgrd port that every ANSYS install checks out licenses from.

Protocol: TCP  
IANA registry

## DESCRIPTION

ANSYS registered 1055 with IANA for FlexNet (and 2325 for its Licensing Interconnect), and its documentation names 1055 as the port `lmgrd` listens on. An ANSYS workstation is pointed at `1055@licenseserver`, contacts lmgrd there, and is then redirected to the `ansyslmd` vendor daemon, whose port is random by default unless an admin pins it with `PORT=` on the VENDOR line. On a scan, 1055 marks an engineering-simulation license server, which usually sits on a well-connected internal host because every CAE seat in the building depends on it. Firewall guidance from ANSYS is to open 1055, 2325, and whatever static vendor-daemon port the license file specifies.

## EXPOSURE

**Do not expose.** FlexNet license servers have no user authentication and a long CVE history in lmgrd/lmadmin; keep them on the engineering network and reach them over a VPN, never from the internet.

## CHECK

```sh
lmutil lmstat -a -c 1055@TARGET
```

## SEE ALSO

- docs — [ANSYS Licensing Guide — Understanding Port Numbers](https://ansyshelp.ansys.com/public/Views/Secured/corp/v242/en/ai_elg/aiELG_portnums.html) (ansyshelp.ansys.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)

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HTML: <https://whatport.net/1055/> · JSON: <https://whatport.net/1055.json> · full dataset: <https://whatport.net/ports.json>