All ports
Port3890/TCP
ndsconnectPort
3890
Protocol
TCP
Category
Registered
Service
ndsconnect
What is port 3890?
Port 3890/TCP is a Registered port, registered with IANA for specific applications. It is associated with the ndsconnect service.
Niche Data Server Connect
Useful commands
nmapnmap -p 3890 -sV example.comnetcatnc -zv example.com 3890curlcurl -v http://example.com:3890/telnettelnet example.com 3890bash(echo > /dev/tcp/example.com/3890) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3890/tcpDeny
sudo ufw deny 3890/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 3890 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 3890 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3890/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3890" dir=in action=allow protocol=TCP localport=3890Security 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- Outdated versions with vulnerabilities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 3890/TCP?
Port 3890/TCP is associated with the ndsconnect service. Niche Data Server Connect
Is it safe to expose port 3890 to the Internet?
It depends on the service and configuration. Port 3890 (ndsconnect) 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 3890 is open?
You can use nmap: `nmap -p 3890 -sV example.com`, netcat: `nc -zv example.com 3890`, or the bash command: `(echo > /dev/tcp/example.com/3890) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3890 on my firewall?
On Linux with UFW: `sudo ufw allow 3890/tcp` (open) or `sudo ufw deny 3890/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 3890 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3890" dir=in action=allow protocol=TCP localport=3890`.
What applications and services use port 3890?
Port 3890/TCP is used by the ndsconnect service. Specific uses depend on the software and configuration. Check our related tools section for more information.