Port 2961: BoldSoft License Manager — A Registered Ghost

What Port 2961 Is

Port 2961 sits in the registered ports range (1024–49151), the middle tier of the port number space governed by IANA. These ports aren't reserved like the well-known ports below 1024 — they're claimed. Any organization or individual can apply to IANA and stake a number for their software.

Port 2961 was claimed by Fredrik Haglund for the BoldSoft License Manager (BOLDSOFT-LM), registered on both TCP and UDP. BoldSoft appears to have been a small software company — likely Swedish, given the name — that needed a dedicated port for its license enforcement service. At some point, it submitted the paperwork, IANA recorded the assignment, and there it sits.¹

BoldSoft, as best anyone can tell, no longer exists in any active form. The license manager it built is not in use anywhere that generates public visibility. The port is occupied in the registry and empty in practice.

What Registered Ports Actually Mean

IANA registration doesn't mean a port is widely used. It means someone asked. The registered range contains thousands of entries for software that peaked in the 1990s, startups that folded, internal tools that never shipped, and license managers for products nobody uses anymore. The registry is an archaeological record as much as an operational one.

What registration does provide: a formal claim. If you see traffic on port 2961, it's not BOLDSOFT-LM. Nothing is running BOLDSOFT-LM. Whatever is on that port is either a misconfigured service, a custom application using a convenient unoccupied number, or something worth investigating.

How to Check What's Listening on Port 2961

If you want to see whether anything on your machine is bound to port 2961:

macOS / Linux:

lsof -i :2961

Windows:

netstat -ano | findstr :2961

To check from outside your machine (useful for servers):

nmap -p 2961 <hostname-or-ip>

If something is listening, check the process name. It won't be BoldSoft.