Port 44444 (cognex-dataman)

IANA assigns port 44444 to cognex-dataman: Cognex DataMan Management Protocol.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

cognex-dataman TCP Cognex DataMan Management Protocol Cognex -

Registry dates for this port: registered 2012-08-28.

Linux: is anything listening on TCP 44444?

sudo ss -tlnp 'sport = :44444'

Linux / macOS: which process owns the port

sudo lsof -nP -i :44444

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':44444 '

Windows (Command Prompt)

netstat -ano | findstr :44444

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 44444 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 44444

From Windows

Test-NetConnection HOST -Port 44444

ufw

sudo ufw deny 44444/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 44444 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 44444 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 44444' -Direction Inbound -Protocol TCP -LocalPort 44444 -Action Block

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