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Port 5747 (tunatic)

IANA assigns port 5747 to tunatic: Wildbits Tunatic.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tunatic TCP Wildbits Tunatic Sylvain Demongeot -
tunatic UDP Wildbits Tunatic Sylvain Demongeot -

Registry dates for this port: registered 2005-08.

Check what is listening on port 5747

Linux: is anything listening on TCP 5747?
sudo ss -tlnp 'sport = :5747'
Linux: UDP 5747
sudo ss -ulnp 'sport = :5747'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5747
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5747 '
Windows (Command Prompt)
netstat -ano | findstr :5747
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5747 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5747
From Windows
Test-NetConnection HOST -Port 5747
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5747

Block port 5747 in the firewall

ufw
sudo ufw deny 5747/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5747 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5747 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5747' -Direction Inbound -Protocol TCP -LocalPort 5747 -Action Block
ufw
sudo ufw deny 5747/udp
iptables
sudo iptables -A INPUT -p udp --dport 5747 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5747 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5747' -Direction Inbound -Protocol UDP -LocalPort 5747 -Action Block

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