Port 2678: Gadget Gate 2 Way — A registered port with no known software

Port 2678 sits in the registered ports range, carries an official IANA service name, and has essentially no presence on the Internet. It is a registered ghost.

What IANA Says

The official IANA Service Name and Transport Protocol Port Number Registry lists port 2678 as:

• Service name: gadgetgate2way
• Protocol: TCP and UDP
• Description: Gadget Gate 2 Way
• Assignee: Matt Rollins, matt@anybusiness.com¹

That is the entirety of the official record. No RFC. No specification. No documentation of what "Gadget Gate 2 Way" actually does, what software uses it, or what problem it was meant to solve.

The contact domain — anybusiness.com — is a generic placeholder domain. Whether this was a real project that never shipped, a product that was quietly abandoned, or simply a reservation that outlasted whatever it was reserved for, the trail ends there.

The Registered Ports Range

Port 2678 belongs to the registered ports range: 1024 through 49151.²

This range works differently from the well-known ports below 1024. Well-known ports (like 80 for HTTP, 443 for HTTPS, 22 for SSH) are tightly controlled and document critical infrastructure. The registered range is looser — it exists so that applications can claim a consistent port number without the strict oversight of the well-known range.

Any developer or company can apply to IANA to register a port for their application. The bar is procedural, not technical. IANA records the registration; it does not verify that the software works, is maintained, or even exists.

Port 2678 is what happens when a registration outlives its software. The name persists in every port database on the Internet, pointing at something that may never have been real.

How to Check What's Actually on This Port

If you see traffic on port 2678 on your own machine or network, the service name in IANA's registry is not a reliable guide. Run this to see what process is listening:

macOS / Linux:

sudo lsof -i :2678

Windows:

netstat -ano | findstr :2678

If something is listening on this port and you don't recognize it, the process name (or PID, which you can look up in Task Manager or ps) will tell you more than the port number ever could.

Why Phantom Registrations Matter

The registered ports range has over 48,000 slots. Many of them look like port 2678: registered by someone, at some point, for something — with no surviving documentation.

This matters for two reasons.

First, it means port numbers are not reliable identifiers of traffic type. A firewall rule that allows port 2678 because IANA calls it "gadgetgate2way" is not doing meaningful security work. Any application — legitimate or otherwise — can bind to an unoccupied registered port. The number tells you what something was supposed to be, not what it is.

Second, it's a reminder that the Internet's infrastructure is built and maintained by people, and people move on. Port registrations don't expire. The record of "gadgetgate2way" will probably still be in the IANA database long after everyone who ever cared about it is gone.