All ports
Port4989/UDP
parallelPort
4989
Protocol
UDP
Category
Registered
Service
parallel
What is port 4989?
Port 4989/UDP is a Registered port, registered with IANA for specific applications. It is associated with the parallel service.
Parallel for GAUSS (tm)
Useful commands
nmapnmap -p 4989 -sV example.comnetcatnc -zv example.com 4989curlcurl -v http://example.com:4989/telnettelnet example.com 4989bash(echo > /dev/udp/example.com/4989) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4989/udpDeny
sudo ufw deny 4989/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4989 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4989 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4989/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4989" dir=in action=allow protocol=UDP localport=4989Security 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- Outdated versions with vulnerabilities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 4989/UDP?
Port 4989/UDP is associated with the parallel service. Parallel for GAUSS (tm)
Is it safe to expose port 4989 to the Internet?
It depends on the service and configuration. Port 4989 (parallel) 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 4989 is open?
You can use nmap: `nmap -p 4989 -sV example.com`, netcat: `nc -zv example.com 4989`, or the bash command: `(echo > /dev/udp/example.com/4989) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4989 on my firewall?
On Linux with UFW: `sudo ufw allow 4989/udp` (open) or `sudo ufw deny 4989/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4989 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4989" dir=in action=allow protocol=UDP localport=4989`.
What applications and services use port 4989?
Port 4989/UDP is used by the parallel service. Specific uses depend on the software and configuration. Check our related tools section for more information.