Port 1102: Adobe Server 1 — The ghost in the registry

Port 1102 sits in the IANA registry with an official assignment: "adobeserver-1" for both TCP and UDP.¹ But if you go looking for what Adobe Server 1 actually is—what it does, what it was for, when it was created—you'll find almost nothing. This port is a ghost.

What Port 1102 Is (Officially)

According to IANA's Service Name and Transport Protocol Port Number Registry, port 1102 is registered to Adobe for a service called "Adobe Server 1."¹ That's all we know for certain.

The registration exists. The port is claimed. But the service itself has either vanished, never saw widespread use, or was internal to Adobe's infrastructure in a way that left no public documentation trail.

The Registered Port Range

Port 1102 falls within the registered port range (1024-49151). This range is managed by IANA, and companies or developers can request specific port assignments for their services. Once registered, a port is officially theirs—but registration doesn't mean the port is actively used.

Thousands of ports in this range were claimed during the Internet's rapid expansion. Some became essential (like port 3306 for MySQL). Others, like 1102, were registered and then... nothing. The service disappeared, was discontinued, or never gained traction. But the port remains claimed, a permanent entry in the registry.

What Might Be Listening (Probably Nothing)

You can check if anything is listening on port 1102 on your system:

Linux/macOS:

sudo lsof -i :1102
sudo netstat -tuln | grep 1102

Windows:

netstat -an | findstr :1102

Odds are, you'll find nothing. Port 1102 isn't commonly used in modern systems. It's not a target for attackers (no known exploits), and it's not a port you'll see in firewall configurations.

Why Ghost Ports Matter

Port 1102 is a reminder that the IANA port registry is as much a historical archive as it is an active directory. Not every registered port represents a living service. Some are fossils—claims staked during the Internet's Wild West phase, when companies grabbed port numbers the way prospectors claimed land.

These ghost ports don't hurt anything. The port space is large enough (65,535 ports per protocol) that a few thousand unused assignments don't matter. But they do tell a story: the Internet is built on the bones of forgotten services, discontinued products, and ideas that never quite shipped.

Port 1102 was officially claimed by Adobe for something called "Adobe Server 1." What that was, we may never know. The port remains, waiting for a service that may never listen again.