All ports
Port9911/UDP
sype-transportPort
9911
Protocol
UDP
Category
Registered
Service
sype-transport
What is port 9911?
Port 9911/UDP is a Registered port, registered with IANA for specific applications. It is associated with the sype-transport service.
SYPECom Transport Protocol
Useful commands
nmapnmap -p 9911 -sV example.comnetcatnc -zv example.com 9911curlcurl -v http://example.com:9911/telnettelnet example.com 9911bash(echo > /dev/udp/example.com/9911) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 9911/udpDeny
sudo ufw deny 9911/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 9911 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 9911 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=9911/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 9911" dir=in action=allow protocol=UDP localport=9911Security 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- Outdated versions with vulnerabilities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 9911/UDP?
Port 9911/UDP is associated with the sype-transport service. SYPECom Transport Protocol
Is it safe to expose port 9911 to the Internet?
It depends on the service and configuration. Port 9911 (sype-transport) 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 9911 is open?
You can use nmap: `nmap -p 9911 -sV example.com`, netcat: `nc -zv example.com 9911`, or the bash command: `(echo > /dev/udp/example.com/9911) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 9911 on my firewall?
On Linux with UFW: `sudo ufw allow 9911/udp` (open) or `sudo ufw deny 9911/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 9911 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 9911" dir=in action=allow protocol=UDP localport=9911`.
What applications and services use port 9911?
Port 9911/UDP is used by the sype-transport service. Specific uses depend on the software and configuration. Check our related tools section for more information.