Port 6267 (gld)

IANA assigns port 6267 to gld: GridLAB-D User Interface.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

gld TCP GridLAB-D User Interface David Chassin -

Registry dates for this port: registered 2010-12-10.

Linux: is anything listening on TCP 6267?

sudo ss -tlnp 'sport = :6267'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6267

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6267 '

Windows (Command Prompt)

netstat -ano | findstr :6267

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6267 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 6267

From Windows

Test-NetConnection HOST -Port 6267

ufw

sudo ufw deny 6267/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6267 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6267 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6267' -Direction Inbound -Protocol TCP -LocalPort 6267 -Action Block

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