Port 888
accessbuilder and cddbp · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | accessbuilder and cddbp |
Frequently asked questions
What is port 888 used for?
Port 888 is registered with the IANA for accessbuilder and cddbp (TCP/UDP). Description: AccessBuilder; CD Database Protocol.
Is port 888 a well-known port?
Yes. Port 888 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 888 is open?
Locally on Linux with ss -tulpn | grep ':888\b', on Windows with netstat -ano | findstr :888. To test a remote host use Test-NetConnection <host> -Port 888 in PowerShell or nc -zv <host> 888 on Linux/macOS.
How do I open port 888 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 888/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=888/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 888" -Direction Inbound -Protocol TCP -LocalPort 888 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | accessbuilder | AccessBuilder |
| UDP | accessbuilder | AccessBuilder |
| TCP | cddbp | CD Database Protocol |