Port 8750 (dey-keyneg)

IANA assigns port 8750 to dey-keyneg: DEY Storage Key Negotiation.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

dey-keyneg TCP DEY Storage Key Negotiation DEY Storage Systems Inc -

Registry dates for this port: registered 2013-03-01.

Linux: is anything listening on TCP 8750?

sudo ss -tlnp 'sport = :8750'

Linux / macOS: which process owns the port

sudo lsof -nP -i :8750

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':8750 '

Windows (Command Prompt)

netstat -ano | findstr :8750

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8750 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 8750

From Windows

Test-NetConnection HOST -Port 8750

ufw

sudo ufw deny 8750/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 8750 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 8750 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 8750' -Direction Inbound -Protocol TCP -LocalPort 8750 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.