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// Other services

Port 1090: FF Fieldbus Message Specification

Port 1090 is assigned by IANA to ff-fms (FF Fieldbus Message Specification).

1090

How ff-fms works

Other services
client:1090ff-fmsresponse client:1090ff-fmsresponse

The client sends a request to port 1090 and the ff-fms 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 1090 dangerous?

We have no specific security note for port 1090. 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 1090

ServicePortTransportDescriptionReferenceUpdated
ff-fms 1090 TCP, UDP FF Fieldbus Message Specification - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1090, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1090'      # process listening on 1090
sudo lsof -nP -i :1090

macOS

sudo lsof -nP -i :1090

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1090 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1090
netstat -ano | findstr :1090

From another machine

nmap -p 1090 -sV <host>
sudo nmap -sU -p 1090 <host>
nc -zv <host> 1090

Block it in the firewall

sudo ufw deny 1090/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1090" -Direction Inbound -LocalPort 1090 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1090 used for?

Port 1090 is assigned by IANA to ff-fms (FF Fieldbus Message Specification).

Is port 1090 TCP or UDP?

Port 1090 is registered for TCP and UDP.

Is it safe to open port 1090?

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 1090 is open?

On Linux run "ss -ltnup 'sport = :1090'", on macOS "lsof -nP -i :1090", and on Windows "netstat -ano | findstr :1090" to see the local process. From another machine, "nmap -p 1090 <host>" shows whether it is reachable.

05 Related
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