Port 2629: Sitara Server — A Registered Ghost

What This Port Is

Port 2629 is registered with IANA for sitaraserver — the Sitara Network Protocol (SNP), developed by Sitara Networks, a company that no longer exists.

The registration covers both TCP and UDP.

The Protocol That Was

Sitara Networks was founded in 1997 in Waltham, Massachusetts, with a specific problem in mind: Internet performance degraded in ways that endpoint software couldn't fix, because the degradation was happening inside the network, not at either end.

Their answer was SNP — a protocol that added Quality of Service intelligence at the network layer, managing traffic between Sitara-equipped nodes to reduce latency and improve throughput across enterprise WANs and the Internet. Their flagship product, QoSWorks, was an appliance that dropped into existing networks and applied SNP to classify and prioritize traffic automatically.

It was a real product solving a real problem. Enterprise customers with distributed networks bought it. Service providers used it to meet SLAs.

In May 2004, Sitara Networks was acquired by Converged Access.¹ Development effectively ended. The software faded. The IANA registration did not.

What the Assignment Means Today

The IANA registry is not a museum — it's a technical record of port ownership. Sitara Networks registered port 2629, and that assignment remains in force.² This means:

• No other service can claim this port through official channels without going through IANA
• If you see traffic on port 2629 today, it is almost certainly not the Sitara Network Protocol
• It might be a misconfigured service, custom software, or something worth investigating

This is one of the quieter stories in the port registry: a port claimed for a legitimate purpose, by a real company, that simply stopped existing. The claim remains. Nobody is home.

Checking What's on This Port

If you see port 2629 active on a machine, use standard tools to identify what's actually there:

# On Linux/macOS — show what process is listening
sudo ss -tlnp | grep 2629
sudo lsof -i :2629

# On Windows
netstat -ano | findstr :2629

# Quick connectivity check from another machine
nc -zv <host> 2629
nmap -p 2629 <host>

Any activity on this port almost certainly has nothing to do with Sitara Networks.

The Registered Ports Range

Port 2629 sits in the registered ports range (1024–49151). This range differs from the well-known ports (0–1023) in one key way: no root or administrator privilege is required to open them. Any user-space application can listen on port 2629 without special permissions.

IANA maintains a registry of registered ports to reduce collisions between legitimate services, but registration is voluntary and enforcement is minimal. Many registered ports, like 2629, belong to software that has been discontinued, acquired, or forgotten — the IANA entry persisting long after the last packet was ever sent.