All ports
Port773/UDP
notifyPort
773
Protocol
UDP
Category
Well-Known
Service
notify
What is port 773?
Port 773/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the notify service.
Useful commands
nmapnmap -p 773 -sV example.comnetcatnc -zv example.com 773curlcurl -v http://example.com:773/telnettelnet example.com 773bash(echo > /dev/udp/example.com/773) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 773/udpDeny
sudo ufw deny 773/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 773 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 773 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=773/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 773" dir=in action=allow protocol=UDP localport=773Security 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- Outdated versions with vulnerabilities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 773/UDP?
Port 773/UDP is associated with the notify service. No detailed description is available in the IANA registry.
Is it safe to expose port 773 to the Internet?
It depends on the service and configuration. Port 773 (notify) is a Well-Known 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 773 is open?
You can use nmap: `nmap -p 773 -sV example.com`, netcat: `nc -zv example.com 773`, or the bash command: `(echo > /dev/udp/example.com/773) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 773 on my firewall?
On Linux with UFW: `sudo ufw allow 773/udp` (open) or `sudo ufw deny 773/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 773 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 773" dir=in action=allow protocol=UDP localport=773`.
What applications and services use port 773?
Port 773/UDP is used by the notify service. Specific uses depend on the software and configuration. Check our related tools section for more information.