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// Other services

Port 8090: Vehicle to station messaging

Port 8090 is assigned by IANA to opsmessaging (Vehicle to station messaging).

8090

How opsmessaging works

Other services
client:8090opsmessagingresponse client:8090opsmessagingresponse

The client sends a request to port 8090 and the opsmessaging service answers.

Transport
TCP
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 8090 dangerous?

We have no specific security note for port 8090. 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 8090

ServicePortTransportDescriptionReferenceUpdated
opsmessaging 8090 TCP Vehicle to station messaging - 2017-02-08
-8090-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 8090, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8090'      # process listening on 8090
sudo lsof -nP -i :8090

macOS

sudo lsof -nP -i :8090

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8090 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8090
netstat -ano | findstr :8090

From another machine

nmap -p 8090 -sV <host>
nc -zv <host> 8090

Block it in the firewall

sudo ufw deny 8090/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8090" -Direction Inbound -LocalPort 8090 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8090 used for?

Port 8090 is assigned by IANA to opsmessaging (Vehicle to station messaging).

Is port 8090 TCP or UDP?

Port 8090 is registered for TCP.

Is it safe to open port 8090?

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 8090 is open?

On Linux run "ss -ltnup 'sport = :8090'", on macOS "lsof -nP -i :8090", and on Windows "netstat -ano | findstr :8090" to see the local process. From another machine, "nmap -p 8090 <host>" shows whether it is reachable.

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