What This Port Is
Port 2837 is registered with IANA under the service name repliweb, assigned to Attunity RepliWeb — an enterprise file replication and data synchronization platform. The registration covers both TCP and UDP.
In RepliWeb's architecture, port 2837 handled Center-Console communication: the management traffic between the central server and the administrative console used to configure replication jobs. A separate port (5745) handled the actual data replication between nodes.
The Software
RepliWeb was founded in 2000 to solve a real problem: distributing large files across geographically dispersed servers reliably and efficiently. Think software deployments, media assets, large datasets — the kind of files that break naive copy jobs. At its peak, RepliWeb had over 1,500 enterprise customers and around $8 million in annual revenue.1
In 2011, Attunity acquired RepliWeb for $7.8 million, folding it into a broader data replication portfolio.2 Eight years later, Qlik acquired Attunity. In August 2020, Qlik announced it was retiring the RepliWeb product line. Support ended January 31, 2022.3
The port number remains in the IANA registry. The software it served does not.
What This Range Means
Port 2837 sits in the registered ports range (1024-49151). These ports aren't reserved for system services the way well-known ports (0-1023) are. Instead, they're registered by software vendors and application developers with IANA to reduce port conflicts between products.
Registration doesn't mean a port is occupied — it means a vendor once filed the paperwork. Many registered ports, like this one, belong to products that have since been discontinued, acquired, or abandoned. The registry is a historical record as much as it is a directory of active services.
What to Do If You See Traffic Here
If port 2837 is active on a system you manage:
- Legacy RepliWeb: Some organizations may still be running RepliWeb infrastructure past its end-of-life date. Check for RepliWeb installations.
- Something else entirely: Unregistered or repurposed. Check what process is actually listening.
On Linux/macOS:
On Windows:
Then map the PID to a process name via Task Manager or:
Why Unassigned (and Dead-Assigned) Ports Matter
The port number space isn't infinite, but it's large enough that most of it goes unused. What matters is what's actually listening on a port on your specific system, not what the IANA registry says.
A port with a dead registration is neither safer nor more dangerous than a genuinely unassigned one. What matters is whether anything is listening, and if so, what it is and whether it should be.
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