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Port 5720 (ms-licensing)

IANA assigns port 5720 to ms-licensing: MS-Licensing.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ms-licensing TCP MS-Licensing Thomas Lindeman -
ms-licensing UDP MS-Licensing Thomas Lindeman -

Registry dates for this port: registered 2002-11.

Check what is listening on port 5720

Linux: is anything listening on TCP 5720?
sudo ss -tlnp 'sport = :5720'
Linux: UDP 5720
sudo ss -ulnp 'sport = :5720'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5720
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5720 '
Windows (Command Prompt)
netstat -ano | findstr :5720
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5720 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5720
From Windows
Test-NetConnection HOST -Port 5720
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5720

Block port 5720 in the firewall

ufw
sudo ufw deny 5720/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5720 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5720 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5720' -Direction Inbound -Protocol TCP -LocalPort 5720 -Action Block
ufw
sudo ufw deny 5720/udp
iptables
sudo iptables -A INPUT -p udp --dport 5720 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5720 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5720' -Direction Inbound -Protocol UDP -LocalPort 5720 -Action Block

Related ports

5718dpm5719dpm-agent5721dtpt5722msdfsr

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