All ports
Port4556/DCCP
dtn-bundlePort
4556
Protocol
DCCP
Category
Registered
Service
dtn-bundle
What is port 4556?
Port 4556/DCCP is a Registered port, registered with IANA for specific applications. It is associated with the dtn-bundle service.
DTN Bundle DCCP CL Protocol
Useful commands
nmapnmap -p 4556 -sV example.comnetcatnc -zv example.com 4556curlcurl -v http://example.com:4556/telnettelnet example.com 4556bash(echo > /dev/dccp/example.com/4556) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4556/dccpDeny
sudo ufw deny 4556/dccpiptablesAllow
sudo iptables -A INPUT -p dccp --dport 4556 -j ACCEPTDeny
sudo iptables -D INPUT -p dccp --dport 4556 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4556/dccpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4556" dir=in action=allow protocol=DCCP localport=4556Security 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- Outdated versions with vulnerabilities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 4556/DCCP?
Port 4556/DCCP is associated with the dtn-bundle service. DTN Bundle DCCP CL Protocol
Is it safe to expose port 4556 to the Internet?
It depends on the service and configuration. Port 4556 (dtn-bundle) 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 4556 is open?
You can use nmap: `nmap -p 4556 -sV example.com`, netcat: `nc -zv example.com 4556`, or the bash command: `(echo > /dev/dccp/example.com/4556) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4556 on my firewall?
On Linux with UFW: `sudo ufw allow 4556/dccp` (open) or `sudo ufw deny 4556/dccp` (close). With iptables: `sudo iptables -A INPUT -p dccp --dport 4556 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4556" dir=in action=allow protocol=DCCP localport=4556`.
What applications and services use port 4556?
Port 4556/DCCP is used by the dtn-bundle service. Specific uses depend on the software and configuration. Check our related tools section for more information.