HTTPfy

Port 6471 (lvision-lm)

IANA assigns port 6471 to lvision-lm: LVision License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
lvision-lm TCP LVision License Manager Brian McKinnon -
lvision-lm UDP LVision License Manager Brian McKinnon -

Check what is listening on port 6471

Linux: is anything listening on TCP 6471?
sudo ss -tlnp 'sport = :6471'
Linux: UDP 6471
sudo ss -ulnp 'sport = :6471'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6471
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6471 '
Windows (Command Prompt)
netstat -ano | findstr :6471
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6471 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6471
From Windows
Test-NetConnection HOST -Port 6471
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6471

Block port 6471 in the firewall

ufw
sudo ufw deny 6471/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6471 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6471 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6471' -Direction Inbound -Protocol TCP -LocalPort 6471 -Action Block
ufw
sudo ufw deny 6471/udp
iptables
sudo iptables -A INPUT -p udp --dport 6471 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6471 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6471' -Direction Inbound -Protocol UDP -LocalPort 6471 -Action Block

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