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// Other services

Port 3283: Net Assistant

Port 3283 is assigned by IANA to net-assistant (Net Assistant).

3283

How net-assistant works

Other services
client:3283net-assistantresponse client:3283net-assistantresponse

The client sends a request to port 3283 and the net-assistant 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 3283 dangerous?

We have no specific security note for port 3283. 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 3283

ServicePortTransportDescriptionReferenceUpdated
net-assistant 3283 TCP, UDP Net Assistant - 2025-01-23

// source: IANA service name and port number registry

03 Check it

Which program uses port 3283, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3283'      # process listening on 3283
sudo lsof -nP -i :3283

macOS

sudo lsof -nP -i :3283

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3283 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3283
netstat -ano | findstr :3283

From another machine

nmap -p 3283 -sV <host>
sudo nmap -sU -p 3283 <host>
nc -zv <host> 3283

Block it in the firewall

sudo ufw deny 3283/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3283" -Direction Inbound -LocalPort 3283 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3283 used for?

Port 3283 is assigned by IANA to net-assistant (Net Assistant).

Is port 3283 TCP or UDP?

Port 3283 is registered for TCP and UDP.

Is it safe to open port 3283?

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 3283 is open?

On Linux run "ss -ltnup 'sport = :3283'", on macOS "lsof -nP -i :3283", and on Windows "netstat -ano | findstr :3283" to see the local process. From another machine, "nmap -p 3283 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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