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// Other services

Port 3692: Brimstone IntelSync

Port 3692 is assigned by IANA to intelsync (Brimstone IntelSync).

3692

How intelsync works

Other services
client:3692intelsyncresponse client:3692intelsyncresponse

The client sends a request to port 3692 and the intelsync 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 3692 dangerous?

We have no specific security note for port 3692. 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 3692

ServicePortTransportDescriptionReferenceUpdated
intelsync 3692 TCP, UDP Brimstone IntelSync - 2003-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 3692, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3692'      # process listening on 3692
sudo lsof -nP -i :3692

macOS

sudo lsof -nP -i :3692

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3692 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3692
netstat -ano | findstr :3692

From another machine

nmap -p 3692 -sV <host>
sudo nmap -sU -p 3692 <host>
nc -zv <host> 3692

Block it in the firewall

sudo ufw deny 3692/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3692" -Direction Inbound -LocalPort 3692 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3692 used for?

Port 3692 is assigned by IANA to intelsync (Brimstone IntelSync).

Is port 3692 TCP or UDP?

Port 3692 is registered for TCP and UDP.

Is it safe to open port 3692?

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 3692 is open?

On Linux run "ss -ltnup 'sport = :3692'", on macOS "lsof -nP -i :3692", and on Windows "netstat -ano | findstr :3692" to see the local process. From another machine, "nmap -p 3692 <host>" shows whether it is reachable.

05 Related
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