All ports
Port4334/TCP
netconf-ch-sshPort
4334
Protocol
TCP
Category
Registered
Service
netconf-ch-ssh
What is port 4334?
Port 4334/TCP is a Registered port, registered with IANA for specific applications. It is associated with the netconf-ch-ssh service.
NETCONF Call Home (SSH)
Useful commands
nmapnmap -p 4334 -sV example.comnetcatnc -zv example.com 4334curlcurl -v http://example.com:4334/telnettelnet example.com 4334bash(echo > /dev/tcp/example.com/4334) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4334/tcpDeny
sudo ufw deny 4334/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 4334 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 4334 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4334/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4334" dir=in action=allow protocol=TCP localport=4334Security Risks
- Unauthorized remote access to the server
- Brute force attacks against SSH credentials
- Exposure of private keys or misconfigurations
- Outdated versions with known vulnerabilities
Frequently Asked Questions
What service runs on port 4334/TCP?
Port 4334/TCP is associated with the netconf-ch-ssh service. NETCONF Call Home (SSH)
Is it safe to expose port 4334 to the Internet?
It depends on the service and configuration. Port 4334 (netconf-ch-ssh) 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 4334 is open?
You can use nmap: `nmap -p 4334 -sV example.com`, netcat: `nc -zv example.com 4334`, or the bash command: `(echo > /dev/tcp/example.com/4334) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4334 on my firewall?
On Linux with UFW: `sudo ufw allow 4334/tcp` (open) or `sudo ufw deny 4334/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 4334 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4334" dir=in action=allow protocol=TCP localport=4334`.
What applications and services use port 4334?
Port 4334/TCP is used by the netconf-ch-ssh service. Specific uses depend on the software and configuration. Check our related tools section for more information.