All ports
Port5820/TCP
autopassdaemonPort
5820
Protocol
TCP
Category
Registered
Service
autopassdaemon
What is port 5820?
Port 5820/TCP is a Registered port, registered with IANA for specific applications. It is associated with the autopassdaemon service.
AutoPass licensing
Useful commands
nmapnmap -p 5820 -sV example.comnetcatnc -zv example.com 5820curlcurl -v http://example.com:5820/telnettelnet example.com 5820bash(echo > /dev/tcp/example.com/5820) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 5820/tcpDeny
sudo ufw deny 5820/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 5820 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 5820 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=5820/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 5820" dir=in action=allow protocol=TCP localport=5820Security 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- Outdated versions with vulnerabilities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 5820/TCP?
Port 5820/TCP is associated with the autopassdaemon service. AutoPass licensing
Is it safe to expose port 5820 to the Internet?
It depends on the service and configuration. Port 5820 (autopassdaemon) 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 5820 is open?
You can use nmap: `nmap -p 5820 -sV example.com`, netcat: `nc -zv example.com 5820`, or the bash command: `(echo > /dev/tcp/example.com/5820) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 5820 on my firewall?
On Linux with UFW: `sudo ufw allow 5820/tcp` (open) or `sudo ufw deny 5820/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 5820 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 5820" dir=in action=allow protocol=TCP localport=5820`.
What applications and services use port 5820?
Port 5820/TCP is used by the autopassdaemon service. Specific uses depend on the software and configuration. Check our related tools section for more information.