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// Other services

Port 3547: Symantec SIM

Port 3547 is assigned by IANA to symantec-sim (Symantec SIM).

3547

How symantec-sim works

Other services
client:3547symantec-simresponse client:3547symantec-simresponse

The client sends a request to port 3547 and the symantec-sim 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 3547 dangerous?

We have no specific security note for port 3547. 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 3547

ServicePortTransportDescriptionReferenceUpdated
symantec-sim 3547 TCP, UDP Symantec SIM - 2002-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 3547, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3547'      # process listening on 3547
sudo lsof -nP -i :3547

macOS

sudo lsof -nP -i :3547

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3547 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3547
netstat -ano | findstr :3547

From another machine

nmap -p 3547 -sV <host>
sudo nmap -sU -p 3547 <host>
nc -zv <host> 3547

Block it in the firewall

sudo ufw deny 3547/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3547" -Direction Inbound -LocalPort 3547 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3547 used for?

Port 3547 is assigned by IANA to symantec-sim (Symantec SIM).

Is port 3547 TCP or UDP?

Port 3547 is registered for TCP and UDP.

Is it safe to open port 3547?

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 3547 is open?

On Linux run "ss -ltnup 'sport = :3547'", on macOS "lsof -nP -i :3547", and on Windows "netstat -ano | findstr :3547" to see the local process. From another machine, "nmap -p 3547 <host>" shows whether it is reachable.

05 Related
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