All ports
Port1973/UDP
dlsrapPort
1973
Protocol
UDP
Category
Registered
Service
dlsrap
What is port 1973?
Port 1973/UDP is a Registered port, registered with IANA for specific applications. It is associated with the dlsrap service.
Data Link Switching Remote Access Protocol
Useful commands
nmapnmap -p 1973 -sV example.comnetcatnc -zv example.com 1973curlcurl -v http://example.com:1973/telnettelnet example.com 1973bash(echo > /dev/udp/example.com/1973) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1973/udpDeny
sudo ufw deny 1973/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1973 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1973 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1973/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1973" dir=in action=allow protocol=UDP localport=1973Security 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- Outdated versions with vulnerabilities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 1973/UDP?
Port 1973/UDP is associated with the dlsrap service. Data Link Switching Remote Access Protocol
Is it safe to expose port 1973 to the Internet?
It depends on the service and configuration. Port 1973 (dlsrap) 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 1973 is open?
You can use nmap: `nmap -p 1973 -sV example.com`, netcat: `nc -zv example.com 1973`, or the bash command: `(echo > /dev/udp/example.com/1973) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1973 on my firewall?
On Linux with UFW: `sudo ufw allow 1973/udp` (open) or `sudo ufw deny 1973/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1973 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1973" dir=in action=allow protocol=UDP localport=1973`.
What applications and services use port 1973?
Port 1973/UDP is used by the dlsrap service. Specific uses depend on the software and configuration. Check our related tools section for more information.