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Port 8688 (openremote-ctrl)

IANA assigns port 8688 to openremote-ctrl: OpenRemote Controller HTTP/REST.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
openremote-ctrl TCP OpenRemote Controller HTTP/REST OpenRemote Inc -

Registry dates for this port: registered 2012-12-18.

Check what is listening on port 8688

Linux: is anything listening on TCP 8688?
sudo ss -tlnp 'sport = :8688'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8688
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8688 '
Windows (Command Prompt)
netstat -ano | findstr :8688
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8688 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8688
From Windows
Test-NetConnection HOST -Port 8688

Block port 8688 in the firewall

ufw
sudo ufw deny 8688/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8688 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8688 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8688' -Direction Inbound -Protocol TCP -LocalPort 8688 -Action Block

Related ports

8675msi-cps-rm, msi-cps-rm-disc8686sun-as-jmxrmi8699vnyx8710semi-grpc

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