All ports
Port1986/UDP
licensedaemonPort
1986
Protocol
UDP
Category
Registered
Service
licensedaemon
What is port 1986?
Port 1986/UDP is a Registered port, registered with IANA for specific applications. It is associated with the licensedaemon service.
cisco license management
Useful commands
nmapnmap -p 1986 -sV example.comnetcatnc -zv example.com 1986curlcurl -v http://example.com:1986/telnettelnet example.com 1986bash(echo > /dev/udp/example.com/1986) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1986/udpDeny
sudo ufw deny 1986/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1986 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1986 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1986/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1986" dir=in action=allow protocol=UDP localport=1986Security 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- Outdated versions with vulnerabilities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 1986/UDP?
Port 1986/UDP is associated with the licensedaemon service. cisco license management
Is it safe to expose port 1986 to the Internet?
It depends on the service and configuration. Port 1986 (licensedaemon) 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 1986 is open?
You can use nmap: `nmap -p 1986 -sV example.com`, netcat: `nc -zv example.com 1986`, or the bash command: `(echo > /dev/udp/example.com/1986) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1986 on my firewall?
On Linux with UFW: `sudo ufw allow 1986/udp` (open) or `sudo ufw deny 1986/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1986 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1986" dir=in action=allow protocol=UDP localport=1986`.
What applications and services use port 1986?
Port 1986/UDP is used by the licensedaemon service. Specific uses depend on the software and configuration. Check our related tools section for more information.