All ports
Port673/UDP
cimplexPort
673
Protocol
UDP
Category
Well-Known
Service
cimplex
What is port 673?
Port 673/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the cimplex service.
CIMPLEX
Useful commands
nmapnmap -p 673 -sV example.comnetcatnc -zv example.com 673curlcurl -v http://example.com:673/telnettelnet example.com 673bash(echo > /dev/udp/example.com/673) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 673/udpDeny
sudo ufw deny 673/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 673 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 673 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=673/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 673" dir=in action=allow protocol=UDP localport=673Security 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- Outdated versions with vulnerabilities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 673/UDP?
Port 673/UDP is associated with the cimplex service. CIMPLEX
Is it safe to expose port 673 to the Internet?
It depends on the service and configuration. Port 673 (cimplex) 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 673 is open?
You can use nmap: `nmap -p 673 -sV example.com`, netcat: `nc -zv example.com 673`, or the bash command: `(echo > /dev/udp/example.com/673) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 673 on my firewall?
On Linux with UFW: `sudo ufw allow 673/udp` (open) or `sudo ufw deny 673/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 673 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 673" dir=in action=allow protocol=UDP localport=673`.
What applications and services use port 673?
Port 673/UDP is used by the cimplex service. Specific uses depend on the software and configuration. Check our related tools section for more information.