HTTPfy

Port 4547 (lanner-lm)

IANA assigns port 4547 to lanner-lm: Lanner License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
lanner-lm TCP Lanner License Manager Les Enstone -
lanner-lm UDP Lanner License Manager Les Enstone -

Check what is listening on port 4547

Linux: is anything listening on TCP 4547?
sudo ss -tlnp 'sport = :4547'
Linux: UDP 4547
sudo ss -ulnp 'sport = :4547'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4547
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4547 '
Windows (Command Prompt)
netstat -ano | findstr :4547
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4547 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4547
From Windows
Test-NetConnection HOST -Port 4547
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4547

Block port 4547 in the firewall

ufw
sudo ufw deny 4547/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4547 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4547 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4547' -Direction Inbound -Protocol TCP -LocalPort 4547 -Action Block
ufw
sudo ufw deny 4547/udp
iptables
sudo iptables -A INPUT -p udp --dport 4547 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4547 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4547' -Direction Inbound -Protocol UDP -LocalPort 4547 -Action Block

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