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// Other services

Port 3649: Nishioka Miyuki Msg Protocol

Port 3649 is assigned by IANA to nmmp (Nishioka Miyuki Msg Protocol).

3649

How nmmp works

Other services
client:3649nmmpresponse client:3649nmmpresponse

The client sends a request to port 3649 and the nmmp 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 3649 dangerous?

We have no specific security note for port 3649. 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 3649

ServicePortTransportDescriptionReferenceUpdated
nmmp 3649 TCP, UDP Nishioka Miyuki Msg Protocol - 2003-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 3649, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3649'      # process listening on 3649
sudo lsof -nP -i :3649

macOS

sudo lsof -nP -i :3649

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3649 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3649
netstat -ano | findstr :3649

From another machine

nmap -p 3649 -sV <host>
sudo nmap -sU -p 3649 <host>
nc -zv <host> 3649

Block it in the firewall

sudo ufw deny 3649/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3649" -Direction Inbound -LocalPort 3649 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3649 used for?

Port 3649 is assigned by IANA to nmmp (Nishioka Miyuki Msg Protocol).

Is port 3649 TCP or UDP?

Port 3649 is registered for TCP and UDP.

Is it safe to open port 3649?

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 3649 is open?

On Linux run "ss -ltnup 'sport = :3649'", on macOS "lsof -nP -i :3649", and on Windows "netstat -ano | findstr :3649" to see the local process. From another machine, "nmap -p 3649 <host>" shows whether it is reachable.

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