Port 3228: DiamondWave MSG Server — An Assigned Port Nobody Talks About

What Port 3228 Is

Port 3228 sits in the registered port range — the band from 1024 to 49151 that IANA manages for services with a formal claim on a number. Unlike the well-known ports below 1024 (which carry HTTP, SSH, DNS, and the other load-bearing protocols of the Internet), registered ports represent a broader, more varied population: enterprise software, niche protocols, and, frequently, products that never quite made it.

Port 3228 belongs to the last category.

The Official Assignment: DiamondWave MSG Server

IANA records port 3228 as dwmsgserver — the DiamondWave MSG Server, registered for both TCP and UDP.¹ DiamondWave was a telecommunications company, and dwmsgserver appears to have been some form of messaging or signaling service.

The company left almost no public documentation about what this server actually did, and the assignment itself has faded into the background of the IANA registry — officially occupied, practically empty.

The Citrix Overlap

Port 3228 also falls inside a range that Citrix claimed for a different purpose entirely: ports 3224 through 3324 UDP were used by Citrix NetScaler Gateway for Framehawk, a display remoting protocol designed for poor network conditions.² Framehawk compressed and prioritized visual data to keep virtual desktops responsive over high-latency or lossy connections.

Citrix discontinued Framehawk in 2018. If you encounter UDP traffic on 3228 in an older enterprise environment, Framehawk is a plausible explanation — though at this point, legacy rather than active infrastructure.

No Known Unofficial Uses

Port 3228 has no significant observed use in malware, peer-to-peer software, game servers, or any other informal ecosystem. It is not flagged in major threat intelligence databases and has not accumulated the kind of notoriety that makes security teams pay special attention to it.

If you're seeing traffic on this port, it is almost certainly either application-specific (a piece of software that chose this number for its own reasons) or misrouted.

How to Check What's Listening on This Port

If port 3228 is open on a machine you administer, find out what's holding it:

Linux / macOS:

# Show which process is listening on port 3228
ss -tlnp | grep 3228

# Or with lsof
lsof -i :3228

Windows:

# Show listening ports with process IDs
netstat -ano | findstr :3228

# Look up the process by PID
Get-Process -Id <PID>

The process name will tell you everything. If it's unfamiliar, that's worth investigating.

Why Unassigned Ports Matter

The registered port range holds 48,128 possible numbers. IANA has assigned several thousand of them. The rest — including most of the neighbors around 3228 — are formally unassigned, available for dynamic use or claimed by applications that never bothered to register.

This matters because the port number alone carries almost no reliable information. A service can run on any port. Firewalls that block by port number create the illusion of security without much of the substance. What a port carries matters far more than what it's called.

Port 3228 is a small illustration of this: officially assigned to something that never became visible, probably used for nothing, occasionally swept up in another protocol's range declaration. Its story is mostly the absence of a story.