All ports
Port3161/UDP
doc1lmPort
3161
Protocol
UDP
Category
Registered
Service
doc1lm
What is port 3161?
Port 3161/UDP is a Registered port, registered with IANA for specific applications. It is associated with the doc1lm service.
DOC1 License Manager
Useful commands
nmapnmap -p 3161 -sV example.comnetcatnc -zv example.com 3161curlcurl -v http://example.com:3161/telnettelnet example.com 3161bash(echo > /dev/udp/example.com/3161) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3161/udpDeny
sudo ufw deny 3161/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3161 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3161 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3161/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3161" dir=in action=allow protocol=UDP localport=3161Security 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- Outdated versions with vulnerabilities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 3161/UDP?
Port 3161/UDP is associated with the doc1lm service. DOC1 License Manager
Is it safe to expose port 3161 to the Internet?
It depends on the service and configuration. Port 3161 (doc1lm) 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 3161 is open?
You can use nmap: `nmap -p 3161 -sV example.com`, netcat: `nc -zv example.com 3161`, or the bash command: `(echo > /dev/udp/example.com/3161) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3161 on my firewall?
On Linux with UFW: `sudo ufw allow 3161/udp` (open) or `sudo ufw deny 3161/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3161 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3161" dir=in action=allow protocol=UDP localport=3161`.
What applications and services use port 3161?
Port 3161/UDP is used by the doc1lm service. Specific uses depend on the software and configuration. Check our related tools section for more information.