Port 24666 (sdtvwcam)

IANA assigns port 24666 to sdtvwcam: Service used by SmarDTV to communicate between a CAM and a second screen application.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

sdtvwcam TCP Service used by SmarDTV to communicate between a CAM and a second screen application SmarDTV -

Registry dates for this port: registered 2015-03-04.

Linux: is anything listening on TCP 24666?

sudo ss -tlnp 'sport = :24666'

Linux / macOS: which process owns the port

sudo lsof -nP -i :24666

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':24666 '

Windows (Command Prompt)

netstat -ano | findstr :24666

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 24666 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 24666

From Windows

Test-NetConnection HOST -Port 24666

ufw

sudo ufw deny 24666/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 24666 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 24666 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 24666' -Direction Inbound -Protocol TCP -LocalPort 24666 -Action Block

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