All ports
Port3820/UDP
scpPort
3820
Protocol
UDP
Category
Registered
Service
scp
What is port 3820?
Port 3820/UDP is a Registered port, registered with IANA for specific applications. It is associated with the scp service.
Siemens AuD SCP
Useful commands
nmapnmap -p 3820 -sV example.comnetcatnc -zv example.com 3820curlcurl -v http://example.com:3820/telnettelnet example.com 3820bash(echo > /dev/udp/example.com/3820) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3820/udpDeny
sudo ufw deny 3820/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3820 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3820 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3820/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3820" dir=in action=allow protocol=UDP localport=3820Security 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- Outdated versions with vulnerabilities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 3820/UDP?
Port 3820/UDP is associated with the scp service. Siemens AuD SCP
Is it safe to expose port 3820 to the Internet?
It depends on the service and configuration. Port 3820 (scp) 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 3820 is open?
You can use nmap: `nmap -p 3820 -sV example.com`, netcat: `nc -zv example.com 3820`, or the bash command: `(echo > /dev/udp/example.com/3820) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3820 on my firewall?
On Linux with UFW: `sudo ufw allow 3820/udp` (open) or `sudo ufw deny 3820/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3820 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3820" dir=in action=allow protocol=UDP localport=3820`.
What applications and services use port 3820?
Port 3820/UDP is used by the scp service. Specific uses depend on the software and configuration. Check our related tools section for more information.