All ports
Port2991/UDP
wkstn-monPort
2991
Protocol
UDP
Category
Registered
Service
wkstn-mon
What is port 2991?
Port 2991/UDP is a Registered port, registered with IANA for specific applications. It is associated with the wkstn-mon service.
WKSTN-MON
Useful commands
nmapnmap -p 2991 -sV example.comnetcatnc -zv example.com 2991curlcurl -v http://example.com:2991/telnettelnet example.com 2991bash(echo > /dev/udp/example.com/2991) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2991/udpDeny
sudo ufw deny 2991/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2991 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2991 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2991/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2991" dir=in action=allow protocol=UDP localport=2991Security 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- Outdated versions with vulnerabilities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 2991/UDP?
Port 2991/UDP is associated with the wkstn-mon service. WKSTN-MON
Is it safe to expose port 2991 to the Internet?
It depends on the service and configuration. Port 2991 (wkstn-mon) 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 2991 is open?
You can use nmap: `nmap -p 2991 -sV example.com`, netcat: `nc -zv example.com 2991`, or the bash command: `(echo > /dev/udp/example.com/2991) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2991 on my firewall?
On Linux with UFW: `sudo ufw allow 2991/udp` (open) or `sudo ufw deny 2991/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2991 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2991" dir=in action=allow protocol=UDP localport=2991`.
What applications and services use port 2991?
Port 2991/UDP is used by the wkstn-mon service. Specific uses depend on the software and configuration. Check our related tools section for more information.