All ports
Port13721/UDP
bpdbmPort
13721
Protocol
UDP
Category
Registered
Service
bpdbm
What is port 13721?
Port 13721/UDP is a Registered port, registered with IANA for specific applications. It is associated with the bpdbm service.
BPDBM Protocol (VERITAS NetBackup)
Useful commands
nmapnmap -p 13721 -sV example.comnetcatnc -zv example.com 13721curlcurl -v http://example.com:13721/telnettelnet example.com 13721bash(echo > /dev/udp/example.com/13721) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 13721/udpDeny
sudo ufw deny 13721/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 13721 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 13721 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=13721/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 13721" dir=in action=allow protocol=UDP localport=13721Security 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- Outdated versions with vulnerabilities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 13721/UDP?
Port 13721/UDP is associated with the bpdbm service. BPDBM Protocol (VERITAS NetBackup)
Is it safe to expose port 13721 to the Internet?
It depends on the service and configuration. Port 13721 (bpdbm) 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 13721 is open?
You can use nmap: `nmap -p 13721 -sV example.com`, netcat: `nc -zv example.com 13721`, or the bash command: `(echo > /dev/udp/example.com/13721) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 13721 on my firewall?
On Linux with UFW: `sudo ufw allow 13721/udp` (open) or `sudo ufw deny 13721/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 13721 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 13721" dir=in action=allow protocol=UDP localport=13721`.
What applications and services use port 13721?
Port 13721/UDP is used by the bpdbm service. Specific uses depend on the software and configuration. Check our related tools section for more information.