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Port 5079 (cp-spxrpts)

IANA assigns port 5079 to cp-spxrpts: Cambridge Pixel SPx Reports.

Registered (user) port, 1024-49151 UDP

Port 5079 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
cp-spxrpts UDP Cambridge Pixel SPx Reports Richard Warren -

Registry dates for this port: registered 2008-09-17.

Check what is listening on port 5079

Linux: UDP 5079
sudo ss -ulnp 'sport = :5079'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5079
Windows (Command Prompt)
netstat -ano | findstr :5079
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 5079

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5079

Block port 5079 in the firewall

ufw
sudo ufw deny 5079/udp
iptables
sudo iptables -A INPUT -p udp --dport 5079 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5079 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5079' -Direction Inbound -Protocol UDP -LocalPort 5079 -Action Block

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