CyberHunter
Local dataset, no network
// Other services

Port 3683: BMC EDV/EA

Port 3683 is assigned by IANA to bmc-ea (BMC EDV/EA).

3683

How bmc-ea works

Other services
client:3683bmc-earesponse client:3683bmc-earesponse

The client sends a request to port 3683 and the bmc-ea 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 3683 dangerous?

We have no specific security note for port 3683. 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 3683

ServicePortTransportDescriptionReferenceUpdated
bmc-ea 3683 TCP, UDP BMC EDV/EA - 2003-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 3683, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3683'      # process listening on 3683
sudo lsof -nP -i :3683

macOS

sudo lsof -nP -i :3683

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3683 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3683
netstat -ano | findstr :3683

From another machine

nmap -p 3683 -sV <host>
sudo nmap -sU -p 3683 <host>
nc -zv <host> 3683

Block it in the firewall

sudo ufw deny 3683/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3683" -Direction Inbound -LocalPort 3683 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3683 used for?

Port 3683 is assigned by IANA to bmc-ea (BMC EDV/EA).

Is port 3683 TCP or UDP?

Port 3683 is registered for TCP and UDP.

Is it safe to open port 3683?

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 3683 is open?

On Linux run "ss -ltnup 'sport = :3683'", on macOS "lsof -nP -i :3683", and on Windows "netstat -ano | findstr :3683" to see the local process. From another machine, "nmap -p 3683 <host>" shows whether it is reachable.

05 Related
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