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// Other services

Port 18668: Manufacturing Execution Systems Mesh Communication

Port 18668 is assigned by IANA to vdmmesh (Manufacturing Execution Systems Mesh Communication), vdmmesh-disc (Manufacturing Execution Systems Mesh Communication).

18668

How vdmmesh works

Other services
client:18668vdmmeshresponse client:18668vdmmeshresponse

The client sends a request to port 18668 and the vdmmesh service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 18668 dangerous?

We have no specific security note for port 18668. 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 18668

ServicePortTransportDescriptionReferenceUpdated
vdmmesh 18668 TCP Manufacturing Execution Systems Mesh Communication - 2016-10-31
vdmmesh-disc 18668 UDP Manufacturing Execution Systems Mesh Communication - 2016-10-31

// source: IANA service name and port number registry

03 Check it

Which program uses port 18668, and is it reachable?

Linux

sudo ss -ltnup 'sport = :18668'      # process listening on 18668
sudo lsof -nP -i :18668

macOS

sudo lsof -nP -i :18668

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 18668 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 18668
netstat -ano | findstr :18668

From another machine

nmap -p 18668 -sV <host>
sudo nmap -sU -p 18668 <host>
nc -zv <host> 18668

Block it in the firewall

sudo ufw deny 18668/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 18668" -Direction Inbound -LocalPort 18668 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 18668 used for?

Port 18668 is assigned by IANA to vdmmesh (Manufacturing Execution Systems Mesh Communication), vdmmesh-disc (Manufacturing Execution Systems Mesh Communication).

Is port 18668 TCP or UDP?

Port 18668 is registered for TCP and UDP.

Is it safe to open port 18668?

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 18668 is open?

On Linux run "ss -ltnup 'sport = :18668'", on macOS "lsof -nP -i :18668", and on Windows "netstat -ano | findstr :18668" to see the local process. From another machine, "nmap -p 18668 <host>" shows whether it is reachable.

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