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// Other services

Port 3828: Netadmin Systems Event Handler

Port 3828 is assigned by IANA to neteh (Netadmin Systems Event Handler).

3828

How neteh works

Other services
client:3828netehresponse client:3828netehresponse

The client sends a request to port 3828 and the neteh 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 3828 dangerous?

We have no specific security note for port 3828. 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 3828

ServicePortTransportDescriptionReferenceUpdated
neteh 3828 TCP, UDP Netadmin Systems Event Handler - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3828, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3828'      # process listening on 3828
sudo lsof -nP -i :3828

macOS

sudo lsof -nP -i :3828

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3828 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3828
netstat -ano | findstr :3828

From another machine

nmap -p 3828 -sV <host>
sudo nmap -sU -p 3828 <host>
nc -zv <host> 3828

Block it in the firewall

sudo ufw deny 3828/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3828" -Direction Inbound -LocalPort 3828 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3828 used for?

Port 3828 is assigned by IANA to neteh (Netadmin Systems Event Handler).

Is port 3828 TCP or UDP?

Port 3828 is registered for TCP and UDP.

Is it safe to open port 3828?

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 3828 is open?

On Linux run "ss -ltnup 'sport = :3828'", on macOS "lsof -nP -i :3828", and on Windows "netstat -ano | findstr :3828" to see the local process. From another machine, "nmap -p 3828 <host>" shows whether it is reachable.

05 Related
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