HTTPfy

Port 5689 (qmvideo)

IANA assigns port 5689 to qmvideo: QM video network management protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
qmvideo TCP QM video network management protocol Jamie Lokier -
qmvideo UDP QM video network management protocol Jamie Lokier -

Registry dates for this port: registered 2006-05.

Check what is listening on port 5689

Linux: is anything listening on TCP 5689?
sudo ss -tlnp 'sport = :5689'
Linux: UDP 5689
sudo ss -ulnp 'sport = :5689'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5689
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5689 '
Windows (Command Prompt)
netstat -ano | findstr :5689
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5689 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5689
From Windows
Test-NetConnection HOST -Port 5689
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5689

Block port 5689 in the firewall

ufw
sudo ufw deny 5689/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5689 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5689 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5689' -Direction Inbound -Protocol TCP -LocalPort 5689 -Action Block
ufw
sudo ufw deny 5689/udp
iptables
sudo iptables -A INPUT -p udp --dport 5689 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5689 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5689' -Direction Inbound -Protocol UDP -LocalPort 5689 -Action Block

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