Port 2921

cesdcdman · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicecesdcdman

Frequently asked questions

What is port 2921 used for?

Port 2921 is registered with the IANA for cesdcdman (TCP/UDP). Description: CESD Contents Delivery Management.

Is port 2921 a well-known port?

No. Port 2921 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 2921 is open?

Locally on Linux with ss -tulpn | grep ':2921\b', on Windows with netstat -ano | findstr :2921. To test a remote host use Test-NetConnection <host> -Port 2921 in PowerShell or nc -zv <host> 2921 on Linux/macOS.

How do I open port 2921 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 2921/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=2921/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 2921" -Direction Inbound -Protocol TCP -LocalPort 2921 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPcesdcdmanCESD Contents Delivery Management
UDPcesdcdmanCESD Contents Delivery Management

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