All ports
Port19/TCP
chargenPort
19
Protocol
TCP
Category
Well-Known
Service
chargen
What is port 19?
Port 19/TCP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the chargen service.
Character Generator
Useful commands
nmapnmap -p 19 -sV example.comnetcatnc -zv example.com 19curlcurl -v http://example.com:19/telnettelnet example.com 19bash(echo > /dev/tcp/example.com/19) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 19/tcpDeny
sudo ufw deny 19/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 19 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 19 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=19/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 19" dir=in action=allow protocol=TCP localport=19Security 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- Outdated versions with vulnerabilities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 19/TCP?
Port 19/TCP is associated with the chargen service. Character Generator
Is it safe to expose port 19 to the Internet?
It depends on the service and configuration. Port 19 (chargen) 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 19 is open?
You can use nmap: `nmap -p 19 -sV example.com`, netcat: `nc -zv example.com 19`, or the bash command: `(echo > /dev/tcp/example.com/19) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 19 on my firewall?
On Linux with UFW: `sudo ufw allow 19/tcp` (open) or `sudo ufw deny 19/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 19 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 19" dir=in action=allow protocol=TCP localport=19`.
What applications and services use port 19?
Port 19/TCP is used by the chargen service. Specific uses depend on the software and configuration. Check our related tools section for more information.