Port 2080: Autodesk adskflex — The License Gatekeeper

What Port 2080 Does

Port 2080 is registered with IANA to adskflex — the Autodesk vendor daemon that manages network software licenses for Autodesk products. When an architect opens AutoCAD, or a visual effects artist launches Maya on a networked workstation, their machine connects to port 2080 on the license server. The daemon checks out a seat. When they close the application, the seat goes back into the pool.

It works alongside port 27000 (the FlexNet license manager lmgrd), which handles the overall licensing coordination. Port 2080 is specifically Autodesk's slice of that system — the vendor-specific daemon that speaks for Autodesk products in particular.

The FLEXnet Licensing System

Autodesk uses FLEXnet (formerly FLEXlm) for network license management — a floating license system common in enterprise software. The architecture is two-tier:

1. lmgrd runs on ports 27000–27009. It's the traffic cop — receives connections, routes them to the appropriate vendor daemon.
2. adskflex runs on port 2080. It's the Autodesk-specific gatekeeper — tracks which seats are checked out, enforces license counts, handles timeouts.

When a workstation needs a license, it contacts lmgrd first, which hands off to adskflex on port 2080. The license file configuration looks like this:

ADSKFLEX_LICENSE_FILE=2080@license-server.example.com

That 2080@ prefix is how every Autodesk client knows where to knock.¹

Who Uses This Port

Any organization running Autodesk products under a network (floating) license scheme. This includes architecture firms, engineering companies, film and VFX studios, game studios, and manufacturing facilities — anywhere that shares Autodesk seats across multiple machines rather than buying per-seat licenses.

SOFTIMAGE|XSI, before Autodesk discontinued it, used the same port.²

Firewall Considerations

If you manage a network with Autodesk products, your firewall needs to allow:

• Port 2080 TCP — for adskflex
• Ports 27000–27009 TCP — for lmgrd

Block either, and users can't check out licenses. This is one of the more common causes of "License not available" errors in enterprise Autodesk environments.³

How to Check What's Listening on This Port

To see if something is running on port 2080 on your machine:

macOS / Linux:

lsof -i :2080
# or
ss -tlnp | grep 2080

Windows:

netstat -ano | findstr :2080

If you see adskflex.exe (Windows) or adskflex (macOS/Linux) in the output, an Autodesk license server is active. If you see something else, it's an unofficial use — port 2080 is popular as an alternative HTTP port for development servers and proxies, since it's easy to remember and usually free on non-Autodesk machines.

The Registered Port Range

Port 2080 sits in the registered port range (1024–49151). These ports aren't reserved for system services like well-known ports (0–1023) are, but they're tracked by IANA — organizations register them to associate a port number with their software. Registration doesn't prevent anyone from using a port for other purposes; it just provides a canonical record of the intended use.⁴