Port 2061: NetMount — A Registered Ghost

What Port 2061 Is

Port 2061 sits in the registered port range — the band between 1024 and 49151 where IANA assigns names to specific services. Unlike well-known ports (0-1023), registered ports don't require root privileges to bind, and unlike ephemeral ports (49152-65535), they're meant to have stable, named purposes.

Port 2061's named purpose is NetMount.

NetMount: What It Was

According to the IANA registry, port 2061 (both TCP and UDP) belongs to NetMount, a service for mounting remote directories as local network drives. The concept is straightforward: a client machine asks a server to expose a directory, and the client sees it as a local drive. Think of it as a precursor to the kind of network file access that NFS and SMB would eventually standardize.

The registration lists a contact — Alex Oberlander, alexo@netmount.com — but there is no RFC, no public protocol specification, and no known software implementation associated with this specific port assignment. The GitHub project that currently carries the name "NetMount" is an unrelated modern project that uses port 12200, not 2061. ¹

The registration appears to be from an era when individuals and companies could claim port numbers for proprietary services without publishing specifications. Many such registrations became orphans — technically valid entries in the IANA database, pointing at services that never shipped widely or quietly disappeared.

What You'll Actually Find on Port 2061

If you see traffic on port 2061 on a modern network, it is almost certainly not NetMount. It could be:

• A custom application that chose this port because it appeared available
• A misconfigured service
• Malware using an obscure registered port to blend in

How to Check What's Using It

On Linux/macOS:

# See what's listening on port 2061
ss -tlnp sport = :2061

# Or with lsof
lsof -i :2061

On Windows:

netstat -ano | findstr :2061

The process ID in the output can then be looked up in Task Manager or with tasklist.

Why This Matters

The registered port range contains thousands of entries like this — names attached to port numbers, port numbers attached to nothing real. This isn't a flaw in the system. It's an honest record of the Internet's history: services that were planned, services that shipped and died, services that shipped and thrived, all sharing the same namespace.

When an application needs a port and picks one from the registered range without checking the registry, it may land on a number like 2061 — technically claimed, practically free. Most of the time this causes no conflict. Occasionally it causes confusion.

The port system is less a precise catalog and more a sedimentary record. Port 2061 is a layer nobody has dug to in a while.