All ports
Port23401/UDP
novar-alarmPort
23401
Protocol
UDP
Category
Registered
Service
novar-alarm
What is port 23401?
Port 23401/UDP is a Registered port, registered with IANA for specific applications. It is associated with the novar-alarm service.
Novar Alarm
Useful commands
nmapnmap -p 23401 -sV example.comnetcatnc -zv example.com 23401curlcurl -v http://example.com:23401/telnettelnet example.com 23401bash(echo > /dev/udp/example.com/23401) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 23401/udpDeny
sudo ufw deny 23401/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 23401 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 23401 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=23401/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 23401" dir=in action=allow protocol=UDP localport=23401Security 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- Outdated versions with vulnerabilities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 23401/UDP?
Port 23401/UDP is associated with the novar-alarm service. Novar Alarm
Is it safe to expose port 23401 to the Internet?
It depends on the service and configuration. Port 23401 (novar-alarm) 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 23401 is open?
You can use nmap: `nmap -p 23401 -sV example.com`, netcat: `nc -zv example.com 23401`, or the bash command: `(echo > /dev/udp/example.com/23401) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 23401 on my firewall?
On Linux with UFW: `sudo ufw allow 23401/udp` (open) or `sudo ufw deny 23401/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 23401 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 23401" dir=in action=allow protocol=UDP localport=23401`.
What applications and services use port 23401?
Port 23401/UDP is used by the novar-alarm service. Specific uses depend on the software and configuration. Check our related tools section for more information.