Port 4417 (workflowdir)

IANA assigns port 4417 to workflowdir: Workflow Director Communication.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

workflowdir TCP Workflow Director Communication WfDir -

Registry dates for this port: registered 2015-12-11.

Linux: is anything listening on TCP 4417?

sudo ss -tlnp 'sport = :4417'

Linux / macOS: which process owns the port

sudo lsof -nP -i :4417

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':4417 '

Windows (Command Prompt)

netstat -ano | findstr :4417

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4417 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 4417

From Windows

Test-NetConnection HOST -Port 4417

ufw

sudo ufw deny 4417/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 4417 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 4417 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 4417' -Direction Inbound -Protocol TCP -LocalPort 4417 -Action Block

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