What Range This Port Belongs To
Port 3092 falls in the registered ports range (1024–49151), also called User Ports by IANA. This range sits between the well-known ports (0–1023, the territory of HTTP, SSH, and DNS) and the ephemeral ports (49152–65535, the temporary ports your OS assigns to outbound connections).
Registered ports were designed for services to claim officially, through a formal request to IANA. In practice, the registry is a mix of actively-used assignments, long-dead protocols, and empty slots like this one.
Port 3092 is an empty slot.1
What IANA Says
IANA's current registry lists port 3092 as unassigned on both TCP and UDP, with a modification date of 2008-04-22.1 The modification date suggests something was once recorded here and removed, but the registry doesn't say what.
Some secondary port databases reference this port as "NJFSS" (Netware Sync Services), appearing to have come from a SANS port listing.2 Novell's NetWare was a dominant network operating system in the 1980s and 1990s before being largely displaced by Windows Server. Whether port 3092 was ever formally assigned to a NetWare service, or simply appeared in a third-party list and propagated, is not clearly documented.
Any Observed Unofficial Uses
The UDP range 3074–3174 is sometimes associated with Ubisoft's Rainbow Six Vegas, which means port 3092 could appear in firewall logs on gaming networks as incidental traffic.2 This is range-based, not a specific assignment.
No widely deployed application or protocol is known to specifically target port 3092.
How to Check What's Listening on This Port
If you see traffic on port 3092 on your system or network, here is how to investigate.
On Linux or macOS:
On Windows:
The process ID in the output can be matched to an application in Task Manager or with tasklist.
On a firewall or router, inspect connection logs filtered to port 3092. Unexpected persistent connections on unassigned ports can indicate non-standard software, misconfigured applications, or in some cases, malware choosing obscure ports to avoid detection.
Why Unassigned Ports Matter
The port numbering system has 65,535 slots. Fewer than a few thousand have official assignments. The rest are unassigned, which does not mean unused — it means unclaimed.
Unassigned ports are where custom software, internal services, and unofficial protocols live. A developer who needs a port for an internal tool picks something unassigned and documents it locally. This works fine until two different teams in two different organizations choose the same unassigned port for different things, and then their software ends up on the same network.
The registered ports range was meant to prevent this by providing a registry where services could reserve a number. In practice, many services never registered. Many registered numbers were abandoned. Port 3092 is one of the gaps that resulted.
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