Port 2630: Sitara Management — A Ghost in the Registry

Port 2630 is assigned to Sitara Management (sitaramgmt), the management protocol for a Quality of Service appliance built by Sitara Networks — a company that was acquired in 2004 and no longer exists.¹

If you see traffic on this port today, it almost certainly isn't Sitara Management.

What Sitara Networks Was

Sitara Networks was founded in 1997 in Waltham, Massachusetts. Their product, QoSWorks, was a standalone appliance that sat between a network switch and a WAN router, automatically applying QoS rules to outbound traffic.² The idea was simple: enterprises were moving critical applications onto shared Internet connections, and those connections had no idea that a VoIP call deserved better treatment than a file download.

QoSWorks inspected traffic, classified it by application, and applied prioritization policies — automatically, without requiring changes to existing routers or switches. The Sitara Network Protocol (SNP) addressed performance problems across the Internet, intranets, and extranets by giving priority treatment to traffic between Sitara-enhanced endpoints.³

Port 2630 was registered for the management plane of these devices — the channel through which administrators would configure and monitor the appliance.

In 2004, Sitara Networks was acquired by Converged Access. The product line was folded in or discontinued. The port number stayed behind.

The Registered Port Range

Port 2630 sits in the registered ports range (1024–49151), also called user ports. IANA maintains this range as a coordination mechanism: organizations can register a port number for their application so that their traffic doesn't accidentally collide with someone else's.

Registration doesn't mean enforcement. Nothing stops another application from using port 2630. It's a convention, not a lock.

The registered range exists because the well-known ports (0–1023) ran out of room for the expanding ecosystem of networked applications. Thousands of services — some still running, many long dead — claimed their numbers in this range during the 1990s and 2000s boom.

Ghost Ports

Port 2630 is what you might call a ghost port: officially assigned, effectively abandoned. The company that registered it is gone. No modern software intentionally speaks Sitara Management. But the entry persists in the IANA registry,¹ a quiet record that someone once built something here.

The Internet has thousands of these. They're harmless — the registry is a reference, not an active directory. But they're a reminder that the port number space has history, and that history doesn't always get cleaned up.

What to Do If You See Traffic Here

If port 2630 shows up in your firewall logs or network scans, it isn't legacy Sitara equipment (almost certainly). More likely candidates:

• Port scanning — automated scanners probe all ports, including obscure ones
• Malware or botnet traffic — malicious software sometimes uses ports with no official service because they're less likely to be blocked
• Custom internal applications — developers sometimes pick arbitrary registered ports for internal tools

To see what's actually listening on port 2630 on a local machine:

# Linux/macOS — show process listening on port 2630
sudo ss -tlnp sport = :2630

# macOS alternative
sudo lsof -i :2630

# Windows
netstat -ano | findstr :2630

If nothing is listening, the traffic is inbound and your firewall should be the first place to look.