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// Other services

Port 3894: SyAM Agent Port

Port 3894 is assigned by IANA to syam-agent (SyAM Agent Port).

3894

How syam-agent works

Other services
client:3894syam-agentresponse client:3894syam-agentresponse

The client sends a request to port 3894 and the syam-agent service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 3894 dangerous?

We have no specific security note for port 3894. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 3894

ServicePortTransportDescriptionReferenceUpdated
syam-agent 3894 TCP, UDP SyAM Agent Port - 2003-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 3894, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3894'      # process listening on 3894
sudo lsof -nP -i :3894

macOS

sudo lsof -nP -i :3894

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3894 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3894
netstat -ano | findstr :3894

From another machine

nmap -p 3894 -sV <host>
sudo nmap -sU -p 3894 <host>
nc -zv <host> 3894

Block it in the firewall

sudo ufw deny 3894/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3894" -Direction Inbound -LocalPort 3894 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3894 used for?

Port 3894 is assigned by IANA to syam-agent (SyAM Agent Port).

Is port 3894 TCP or UDP?

Port 3894 is registered for TCP and UDP.

Is it safe to open port 3894?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 3894 is open?

On Linux run "ss -ltnup 'sport = :3894'", on macOS "lsof -nP -i :3894", and on Windows "netstat -ano | findstr :3894" to see the local process. From another machine, "nmap -p 3894 <host>" shows whether it is reachable.

05 Related
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