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Port 8090 (opsmessaging)

IANA assigns port 8090 to opsmessaging: Vehicle to station messaging.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
opsmessaging TCP Vehicle to station messaging LAN-ACES Inc -

Registry dates for this port: registered 2017-02-08.

Check what is listening on port 8090

Linux: is anything listening on TCP 8090?
sudo ss -tlnp 'sport = :8090'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8090
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8090 '
Windows (Command Prompt)
netstat -ano | findstr :8090
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8090 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8090
From Windows
Test-NetConnection HOST -Port 8090

Block port 8090 in the firewall

ufw
sudo ufw deny 8090/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8090 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8090 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8090' -Direction Inbound -Protocol TCP -LocalPort 8090 -Action Block

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All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.