What Range This Port Belongs To
Port 3170 sits in the registered ports range (1024–49151), also called user ports. IANA maintains this range as a registry — vendors and developers can formally request port assignments for their software, and IANA records them. Unlike the well-known ports below 1024, registered ports don't require root/administrator privileges to open, and the registry is more of a coordination mechanism than an enforcement system.
The practical implication: if you see something listening on port 3170, it's almost certainly application software, not a core operating system service.
Official Assignment: SERVERVIEW-ASN
IANA assigns port 3170 (both TCP and UDP) to SERVERVIEW-ASN, part of Fujitsu's ServerView Suite.1
ServerView is enterprise server management software for Fujitsu PRIMERGY servers — the kind of hardware running in corporate data centers that monitors CPU temperatures, fan speeds, power supplies, and hardware health. The "ASN" component handles alert and agent communications within the ServerView architecture.
If you find port 3170 open on a server, and that server is a Fujitsu PRIMERGY machine running ServerView agents, you've found it doing exactly what it's registered to do. This is relatively rare outside enterprise environments that specifically run Fujitsu hardware.
Unofficial Use: Rainbow Six: Vegas
Ubisoft's Rainbow Six: Vegas (2006) and its sequel require UDP ports 3074–3174 for online multiplayer.2 Port 3170 falls squarely in the middle of that range.
This was a common port-forwarding task for players on home routers, and the range appears in numerous router configuration guides from the late 2000s. The game's online servers are largely offline now, but the port documentation still circulates.
Two different things claiming the same number — one from enterprise hardware, one from a tactical shooter. Neither conflicts with the other in practice; they live in different contexts entirely.
How to Check What's Listening on This Port
If you find port 3170 open on a machine you manage:
On Linux/macOS:
On Windows:
Then match the PID to a process in Task Manager.
The process name will tell you immediately whether this is Fujitsu ServerView software, a game, or something else entirely.
Why Unassigned (and Quietly Assigned) Ports Matter
The registered port range has 48,127 slots. Most of them are either unassigned or assigned to software so obscure it never ran on more than a few thousand machines. Port 3170 has a real assignment, but you'd only encounter it in the wild if you maintain Fujitsu enterprise servers.
This gap between "registered" and "in active use" is normal and intentional. The registry prevents chaos — without it, two popular applications might independently choose the same port and create conflicts at scale. Even sleepy registrations serve a purpose: they hold space, prevent future collisions, and provide a paper trail if something unexpected shows up.
When you find an unfamiliar port open on a machine, the IANA registry is the first place to check. But the registry tells you what should be there. lsof and ss tell you what is.
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