What This Port Is
Port 2771 is assigned to Vergence CM — the configuration management service of Vergence, a single sign-on and context management platform built for healthcare. It is registered with IANA for both TCP and UDP.1
"CM" stands for Configuration Management: the component responsible for deploying and maintaining Vergence settings across a hospital's workstations and servers.
The Story Behind the Port
Vergence was the flagship product of Sentillion, a healthcare IT company that spent the early 2000s solving a genuinely painful problem: clinicians were logging into 10, 15, sometimes 20 different software applications during a single shift. Every system had its own password. Every login was seconds stolen from patient care.
Sentillion's answer was single sign-on — one credential, one badge tap, instant access to the entire clinical workstation. Vergence also handled context management: if a physician clicked on a patient in the primary clinical information system, the PACS imaging application would automatically open to that exact patient's images. No searching. No re-entering identifiers.
It worked. Vergence was named the #1 healthcare single sign-on product in the KLAS Awards in both 2008 and 2009.2
In 2010, Microsoft acquired Sentillion.3 Two years later, Microsoft and GE Healthcare formed Caradigm, a joint venture that inherited the Vergence product line and continued developing it. The port registration stayed on the books, claimed by a product that had changed hands twice.
Who Would See This Port
If you're monitoring traffic on port 2771, you're almost certainly looking at a hospital network running older Vergence infrastructure, or a legacy system that never migrated. Vergence is not a current mainstream product. A port scanner finding 2771 open in a modern environment should prompt the question: what is this, and does it still need to be here?
How to Check What's Listening
Linux / macOS:
Windows:
The process ID in the output can be cross-referenced in Task Manager or with tasklist.
Why Registered Ports Have Ghosts
The registered port range (1024–49151) is assigned by IANA upon application. A company registers a port for their product, ships the software, and the port number becomes part of that product's identity — baked into firewall rules, deployment guides, and network diagrams at hospitals across the country.
When the company is acquired, when the product is retired, when the clinicians move to newer platforms — the IANA registration doesn't get automatically cleaned up. Port 2771 will remain "Vergence CM" in the registry long after the last Vergence server is decommissioned.
This is not a flaw. It's honesty. The registry is a historical record of what people built and what they needed ports for.
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