All ports
Port2673/UDP
firstcall42Port
2673
Protocol
UDP
Category
Registered
Service
firstcall42
What is port 2673?
Port 2673/UDP is a Registered port, registered with IANA for specific applications. It is associated with the firstcall42 service.
First Call 42
Useful commands
nmapnmap -p 2673 -sV example.comnetcatnc -zv example.com 2673curlcurl -v http://example.com:2673/telnettelnet example.com 2673bash(echo > /dev/udp/example.com/2673) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2673/udpDeny
sudo ufw deny 2673/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2673 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2673 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2673/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2673" dir=in action=allow protocol=UDP localport=2673Security 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- Outdated versions with vulnerabilities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 2673/UDP?
Port 2673/UDP is associated with the firstcall42 service. First Call 42
Is it safe to expose port 2673 to the Internet?
It depends on the service and configuration. Port 2673 (firstcall42) 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 2673 is open?
You can use nmap: `nmap -p 2673 -sV example.com`, netcat: `nc -zv example.com 2673`, or the bash command: `(echo > /dev/udp/example.com/2673) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2673 on my firewall?
On Linux with UFW: `sudo ufw allow 2673/udp` (open) or `sudo ufw deny 2673/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2673 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2673" dir=in action=allow protocol=UDP localport=2673`.
What applications and services use port 2673?
Port 2673/UDP is used by the firstcall42 service. Specific uses depend on the software and configuration. Check our related tools section for more information.