All ports
Port2939/UDP
sm-pas-2Port
2939
Protocol
UDP
Category
Registered
Service
sm-pas-2
What is port 2939?
Port 2939/UDP is a Registered port, registered with IANA for specific applications. It is associated with the sm-pas-2 service.
SM-PAS-2
Useful commands
nmapnmap -p 2939 -sV example.comnetcatnc -zv example.com 2939curlcurl -v http://example.com:2939/telnettelnet example.com 2939bash(echo > /dev/udp/example.com/2939) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2939/udpDeny
sudo ufw deny 2939/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2939 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2939 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2939/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2939" dir=in action=allow protocol=UDP localport=2939Security 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- Outdated versions with vulnerabilities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 2939/UDP?
Port 2939/UDP is associated with the sm-pas-2 service. SM-PAS-2
Is it safe to expose port 2939 to the Internet?
It depends on the service and configuration. Port 2939 (sm-pas-2) 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 2939 is open?
You can use nmap: `nmap -p 2939 -sV example.com`, netcat: `nc -zv example.com 2939`, or the bash command: `(echo > /dev/udp/example.com/2939) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2939 on my firewall?
On Linux with UFW: `sudo ufw allow 2939/udp` (open) or `sudo ufw deny 2939/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2939 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2939" dir=in action=allow protocol=UDP localport=2939`.
What applications and services use port 2939?
Port 2939/UDP is used by the sm-pas-2 service. Specific uses depend on the software and configuration. Check our related tools section for more information.