All ports
Port2921/TCP
cesdcdmanPort
2921
Protocol
TCP
Category
Registered
Service
cesdcdman
What is port 2921?
Port 2921/TCP is a Registered port, registered with IANA for specific applications. It is associated with the cesdcdman service.
CESD Contents Delivery Management
Useful commands
nmapnmap -p 2921 -sV example.comnetcatnc -zv example.com 2921curlcurl -v http://example.com:2921/telnettelnet example.com 2921bash(echo > /dev/tcp/example.com/2921) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2921/tcpDeny
sudo ufw deny 2921/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 2921 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 2921 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2921/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2921" dir=in action=allow protocol=TCP localport=2921Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 2921/TCP?
Port 2921/TCP is associated with the cesdcdman service. CESD Contents Delivery Management
Is it safe to expose port 2921 to the Internet?
It depends on the service and configuration. Port 2921 (cesdcdman) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 2921 is open?
You can use nmap: `nmap -p 2921 -sV example.com`, netcat: `nc -zv example.com 2921`, or the bash command: `(echo > /dev/tcp/example.com/2921) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2921 on my firewall?
On Linux with UFW: `sudo ufw allow 2921/tcp` (open) or `sudo ufw deny 2921/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 2921 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2921" dir=in action=allow protocol=TCP localport=2921`.
What applications and services use port 2921?
Port 2921/TCP is used by the cesdcdman service. Specific uses depend on the software and configuration. Check our related tools section for more information.