CyberHunter
Local dataset, no network
// Other services

Port 3049: NSWS

Port 3049 is assigned by IANA to nsws (NSWS).

3049

How nsws works

Other services
client:3049nswsresponse client:3049nswsresponse

The client sends a request to port 3049 and the nsws 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 3049 dangerous?

We have no specific security note for port 3049. 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 3049

ServicePortTransportDescriptionReferenceUpdated
nsws 3049 TCP, UDP NSWS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3049, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3049'      # process listening on 3049
sudo lsof -nP -i :3049

macOS

sudo lsof -nP -i :3049

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3049 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3049
netstat -ano | findstr :3049

From another machine

nmap -p 3049 -sV <host>
sudo nmap -sU -p 3049 <host>
nc -zv <host> 3049

Block it in the firewall

sudo ufw deny 3049/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3049" -Direction Inbound -LocalPort 3049 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3049 used for?

Port 3049 is assigned by IANA to nsws (NSWS).

Is port 3049 TCP or UDP?

Port 3049 is registered for TCP and UDP.

Is it safe to open port 3049?

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 3049 is open?

On Linux run "ss -ltnup 'sport = :3049'", on macOS "lsof -nP -i :3049", and on Windows "netstat -ano | findstr :3049" to see the local process. From another machine, "nmap -p 3049 <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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