All ports
Port4126/TCP
ddreplPort
4126
Protocol
TCP
Category
Registered
Service
ddrepl
What is port 4126?
Port 4126/TCP is a Registered port, registered with IANA for specific applications. It is associated with the ddrepl service.
Data Domain Replication Service
Useful commands
nmapnmap -p 4126 -sV example.comnetcatnc -zv example.com 4126curlcurl -v http://example.com:4126/telnettelnet example.com 4126bash(echo > /dev/tcp/example.com/4126) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4126/tcpDeny
sudo ufw deny 4126/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 4126 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 4126 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4126/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4126" dir=in action=allow protocol=TCP localport=4126Security 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- Outdated versions with vulnerabilities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 4126/TCP?
Port 4126/TCP is associated with the ddrepl service. Data Domain Replication Service
Is it safe to expose port 4126 to the Internet?
It depends on the service and configuration. Port 4126 (ddrepl) 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 4126 is open?
You can use nmap: `nmap -p 4126 -sV example.com`, netcat: `nc -zv example.com 4126`, or the bash command: `(echo > /dev/tcp/example.com/4126) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4126 on my firewall?
On Linux with UFW: `sudo ufw allow 4126/tcp` (open) or `sudo ufw deny 4126/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 4126 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4126" dir=in action=allow protocol=TCP localport=4126`.
What applications and services use port 4126?
Port 4126/TCP is used by the ddrepl service. Specific uses depend on the software and configuration. Check our related tools section for more information.