All ports
Port3861/TCP
winshadow-hdPort
3861
Protocol
TCP
Category
Registered
Service
winshadow-hd
What is port 3861?
Port 3861/TCP is a Registered port, registered with IANA for specific applications. It is associated with the winshadow-hd service.
winShadow Host Discovery
Useful commands
nmapnmap -p 3861 -sV example.comnetcatnc -zv example.com 3861curlcurl -v http://example.com:3861/telnettelnet example.com 3861bash(echo > /dev/tcp/example.com/3861) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3861/tcpDeny
sudo ufw deny 3861/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 3861 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 3861 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3861/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3861" dir=in action=allow protocol=TCP localport=3861Security 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- Outdated versions with vulnerabilities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 3861/TCP?
Port 3861/TCP is associated with the winshadow-hd service. winShadow Host Discovery
Is it safe to expose port 3861 to the Internet?
It depends on the service and configuration. Port 3861 (winshadow-hd) 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 3861 is open?
You can use nmap: `nmap -p 3861 -sV example.com`, netcat: `nc -zv example.com 3861`, or the bash command: `(echo > /dev/tcp/example.com/3861) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3861 on my firewall?
On Linux with UFW: `sudo ufw allow 3861/tcp` (open) or `sudo ufw deny 3861/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 3861 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3861" dir=in action=allow protocol=TCP localport=3861`.
What applications and services use port 3861?
Port 3861/TCP is used by the winshadow-hd service. Specific uses depend on the software and configuration. Check our related tools section for more information.