All ports
Port1789/TCP
helloPort
1789
Protocol
TCP
Category
Registered
Service
hello
What is port 1789?
Port 1789/TCP is a Registered port, registered with IANA for specific applications. It is associated with the hello service.
hello
Useful commands
nmapnmap -p 1789 -sV example.comnetcatnc -zv example.com 1789curlcurl -v http://example.com:1789/telnettelnet example.com 1789bash(echo > /dev/tcp/example.com/1789) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1789/tcpDeny
sudo ufw deny 1789/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 1789 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 1789 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1789/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1789" dir=in action=allow protocol=TCP localport=1789Security 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- Outdated versions with vulnerabilities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 1789/TCP?
Port 1789/TCP is associated with the hello service. hello
Is it safe to expose port 1789 to the Internet?
It depends on the service and configuration. Port 1789 (hello) 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 1789 is open?
You can use nmap: `nmap -p 1789 -sV example.com`, netcat: `nc -zv example.com 1789`, or the bash command: `(echo > /dev/tcp/example.com/1789) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1789 on my firewall?
On Linux with UFW: `sudo ufw allow 1789/tcp` (open) or `sudo ufw deny 1789/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 1789 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1789" dir=in action=allow protocol=TCP localport=1789`.
What applications and services use port 1789?
Port 1789/TCP is used by the hello service. Specific uses depend on the software and configuration. Check our related tools section for more information.