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// Other services

Port 5418: MCNTP

Port 5418 is assigned by IANA to mcntp (MCNTP).

5418

How mcntp works

Other services
client:5418mcntpresponse client:5418mcntpresponse

The client sends a request to port 5418 and the mcntp 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 5418 dangerous?

We have no specific security note for port 5418. 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 5418

ServicePortTransportDescriptionReferenceUpdated
mcntp 5418 TCP, UDP MCNTP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5418, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5418'      # process listening on 5418
sudo lsof -nP -i :5418

macOS

sudo lsof -nP -i :5418

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5418 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5418
netstat -ano | findstr :5418

From another machine

nmap -p 5418 -sV <host>
sudo nmap -sU -p 5418 <host>
nc -zv <host> 5418

Block it in the firewall

sudo ufw deny 5418/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5418" -Direction Inbound -LocalPort 5418 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5418 used for?

Port 5418 is assigned by IANA to mcntp (MCNTP).

Is port 5418 TCP or UDP?

Port 5418 is registered for TCP and UDP.

Is it safe to open port 5418?

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 5418 is open?

On Linux run "ss -ltnup 'sport = :5418'", on macOS "lsof -nP -i :5418", and on Windows "netstat -ano | findstr :5418" to see the local process. From another machine, "nmap -p 5418 <host>" shows whether it is reachable.

05 Related
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