All ports
Port3309/UDP
tns-advPort
3309
Protocol
UDP
Category
Registered
Service
tns-adv
What is port 3309?
Port 3309/UDP is a Registered port, registered with IANA for specific applications. It is associated with the tns-adv service.
TNS ADV
Useful commands
nmapnmap -p 3309 -sV example.comnetcatnc -zv example.com 3309curlcurl -v http://example.com:3309/telnettelnet example.com 3309bash(echo > /dev/udp/example.com/3309) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3309/udpDeny
sudo ufw deny 3309/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3309 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3309 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3309/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3309" dir=in action=allow protocol=UDP localport=3309Security 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- Outdated versions with vulnerabilities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 3309/UDP?
Port 3309/UDP is associated with the tns-adv service. TNS ADV
Is it safe to expose port 3309 to the Internet?
It depends on the service and configuration. Port 3309 (tns-adv) 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 3309 is open?
You can use nmap: `nmap -p 3309 -sV example.com`, netcat: `nc -zv example.com 3309`, or the bash command: `(echo > /dev/udp/example.com/3309) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3309 on my firewall?
On Linux with UFW: `sudo ufw allow 3309/udp` (open) or `sudo ufw deny 3309/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3309 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3309" dir=in action=allow protocol=UDP localport=3309`.
What applications and services use port 3309?
Port 3309/UDP is used by the tns-adv service. Specific uses depend on the software and configuration. Check our related tools section for more information.