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// Other services

Port 3852: SSE App Configuration

Port 3852 is assigned by IANA to sse-app-config (SSE App Configuration).

3852

How sse-app-config works

Other services
client:3852sse-app-configresponse client:3852sse-app-configresponse

The client sends a request to port 3852 and the sse-app-config 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 3852 dangerous?

We have no specific security note for port 3852. 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 3852

ServicePortTransportDescriptionReferenceUpdated
sse-app-config 3852 TCP, UDP SSE App Configuration - 2003-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 3852, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3852'      # process listening on 3852
sudo lsof -nP -i :3852

macOS

sudo lsof -nP -i :3852

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3852 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3852
netstat -ano | findstr :3852

From another machine

nmap -p 3852 -sV <host>
sudo nmap -sU -p 3852 <host>
nc -zv <host> 3852

Block it in the firewall

sudo ufw deny 3852/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3852" -Direction Inbound -LocalPort 3852 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3852 used for?

Port 3852 is assigned by IANA to sse-app-config (SSE App Configuration).

Is port 3852 TCP or UDP?

Port 3852 is registered for TCP and UDP.

Is it safe to open port 3852?

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 3852 is open?

On Linux run "ss -ltnup 'sport = :3852'", on macOS "lsof -nP -i :3852", and on Windows "netstat -ano | findstr :3852" to see the local process. From another machine, "nmap -p 3852 <host>" shows whether it is reachable.

05 Related
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