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Port 6200 (lm-x)

IANA assigns port 6200 to lm-x: LM-X License Manager by X-Formation.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
lm-x TCP LM-X License Manager by X-Formation Henrik Goldman -
lm-x UDP LM-X License Manager by X-Formation Henrik Goldman -

Registry dates for this port: registered 2006-10.

Check what is listening on port 6200

Linux: is anything listening on TCP 6200?
sudo ss -tlnp 'sport = :6200'
Linux: UDP 6200
sudo ss -ulnp 'sport = :6200'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6200
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6200 '
Windows (Command Prompt)
netstat -ano | findstr :6200
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6200 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6200
From Windows
Test-NetConnection HOST -Port 6200
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6200

Block port 6200 in the firewall

ufw
sudo ufw deny 6200/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6200 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6200 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6200' -Direction Inbound -Protocol TCP -LocalPort 6200 -Action Block
ufw
sudo ufw deny 6200/udp
iptables
sudo iptables -A INPUT -p udp --dport 6200 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6200 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6200' -Direction Inbound -Protocol UDP -LocalPort 6200 -Action Block

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