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Port 8880 (cddbp-alt)

IANA assigns port 8880 to cddbp-alt: CDDBP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cddbp-alt TCP CDDBP Steve Scherf -
cddbp-alt UDP CDDBP Steve Scherf -

Check what is listening on port 8880

Linux: is anything listening on TCP 8880?
sudo ss -tlnp 'sport = :8880'
Linux: UDP 8880
sudo ss -ulnp 'sport = :8880'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8880
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8880 '
Windows (Command Prompt)
netstat -ano | findstr :8880
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8880 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8880
From Windows
Test-NetConnection HOST -Port 8880
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8880

Block port 8880 in the firewall

ufw
sudo ufw deny 8880/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8880 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8880 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8880' -Direction Inbound -Protocol TCP -LocalPort 8880 -Action Block
ufw
sudo ufw deny 8880/udp
iptables
sudo iptables -A INPUT -p udp --dport 8880 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8880 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8880' -Direction Inbound -Protocol UDP -LocalPort 8880 -Action Block

Related ports

88093gpp-monp8873dxspider8881galaxy4d8883MQTT over TLS

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