What Port 1684 Is
Port 1684 sits in the registered ports range (1024–49151). IANA records it under the name snaresecure, associated with Snare — a log collection platform originally called the System iNtrusion Analysis and Reporting Environment.
The idea: Snare agents running on servers collect system event logs (Windows Security logs, syslog, audit trails) and ship them to a central server for analysis. Port 1684 was registered as the secure channel for that communication, distinct from the default unencrypted Snare traffic.
In practice, you will almost never encounter this port in the wild. Real-world Snare deployments typically use standard syslog over TCP/UDP (ports 514 or 6514 for TLS), or route through SIEM platforms using whatever port the destination expects. The "snaresecure" registration appears to be an early, unused reservation — a door that was labeled but never opened.
What "Registered" Actually Means
The registered ports range exists so that software vendors can stake a claim. You submit a request to IANA, they record the name and port number, and that's it. IANA does not verify the protocol is implemented, deployed, or maintained. A port can be registered and functionally abandoned.
Port 1684 is an example of exactly that. It has a name. It has a range. It has almost no footprint anywhere else.
If You See This Port Open
If port 1684 appears open on a system you're investigating, it is almost certainly not Snare. More likely candidates:
- A custom application that picked an arbitrary registered port
- A misconfigured or legacy service
- Malware using an obscure port to avoid detection (uncommon, but possible with any unmonitored port)
Check what's actually listening before drawing conclusions.
How to Check What's Using This Port
On Linux or macOS:
On Windows:
The process ID from netstat maps to a name in Task Manager or via:
Related Ports
- 514 — Standard syslog (UDP/TCP); where most Snare traffic actually goes
- 6514 — Syslog over TLS; the secure syslog path most deployments use
- 6161 — Snare Agent Manager communication port (actually documented and used)
Frequently Asked Questions
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