What This Port Is
Port 3076 is registered with IANA under the service name orbix-config — the configuration channel for Orbix 2000, a CORBA (Common Object Request Broker Architecture) middleware platform built by IONA Technologies.1
If you see traffic on this port today, you're either running legacy enterprise middleware from the late 1990s, or something unrelated has chosen this number informally.
The Range It Belongs To
Port 3076 sits in the registered ports range (1024–49151). These ports are assigned by IANA to specific services and applications, meaning they're claimed — not freely available — but also not protected the way well-known ports (0–1023) are. Any application can open a registered port; only IANA's blessing distinguishes "assigned" from "squatting."
What Orbix 2000 Was
IONA Technologies was founded in 1991 as a spinout from Trinity College Dublin. Their flagship product, Orbix, became the leading implementation of CORBA — a specification that let software objects on different machines, written in different languages, call each other's methods as if they were local.2
It was an ambitious idea. In the late 1990s, CORBA was serious enterprise infrastructure. Banks ran it. Telecoms ran it. The US military ran it. IONA went public on NASDAQ in 1997.
Orbix 2000 used a cluster of nearby ports for different internal services:
- 3075 — Orbix locator
- 3076 — Orbix config (this port)
- 3077 — Orbix notification
Each was a separate daemon. The config service on 3076 let distributed Orbix components discover their configuration at startup — a necessary coordination layer for a system trying to make remote objects feel local.
Why It Went Quiet
CORBA lost. Not dramatically — it just got outflanked. SOAP and REST proved that you didn't need a complex broker to connect distributed systems; HTTP was enough. CORBA's verbosity and complexity became liabilities as the web scaled. The enterprise world moved on.
IONA was acquired by Progress Software in 2008. Progress sold the Orbix product line to Micro Focus in 2012 for $15 million.3 Micro Focus still sells and supports Orbix today, primarily for customers who can't easily migrate decades-old systems. The software works. The world around it changed.
Is Anything Else Using This Port?
No significant unofficial use is documented. Port 3076 doesn't appear in gaming blocklists, security advisories, or common application configurations. It's genuinely quiet — neither notorious nor useful in modern contexts.
If you see something listening on 3076 and you don't run Orbix, investigate it.
How to Check What's Using This Port
macOS / Linux:
Windows:
The process ID in the last column maps to a running application. Cross-reference with Task Manager (Windows) or ps aux | grep <PID> (macOS/Linux) to identify what's there.
Why This Matters
Unassigned and obsolete-assigned ports tell you something true about port space: it's a historical document as much as a technical registry. Port 3076 was claimed during a specific moment — when CORBA looked like it might be how distributed computing worked forever. The registration outlasted the era.
Most of the 48,000+ registered ports are like this: claimed, quiet, waiting. Some belong to software still running in basements and data centers no one wants to touch. Port 3076 is one of those.
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