All ports
Port18136/TCP
racfPort
18136
Protocol
TCP
Category
Registered
Service
racf
What is port 18136?
Port 18136/TCP is a Registered port, registered with IANA for specific applications. It is associated with the racf service.
z/OS Resource Access Control Facility
Useful commands
nmapnmap -p 18136 -sV example.comnetcatnc -zv example.com 18136curlcurl -v http://example.com:18136/telnettelnet example.com 18136bash(echo > /dev/tcp/example.com/18136) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 18136/tcpDeny
sudo ufw deny 18136/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 18136 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 18136 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=18136/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 18136" dir=in action=allow protocol=TCP localport=18136Security 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- Outdated versions with vulnerabilities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 18136/TCP?
Port 18136/TCP is associated with the racf service. z/OS Resource Access Control Facility
Is it safe to expose port 18136 to the Internet?
It depends on the service and configuration. Port 18136 (racf) 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 18136 is open?
You can use nmap: `nmap -p 18136 -sV example.com`, netcat: `nc -zv example.com 18136`, or the bash command: `(echo > /dev/tcp/example.com/18136) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 18136 on my firewall?
On Linux with UFW: `sudo ufw allow 18136/tcp` (open) or `sudo ufw deny 18136/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 18136 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 18136" dir=in action=allow protocol=TCP localport=18136`.
What applications and services use port 18136?
Port 18136/TCP is used by the racf service. Specific uses depend on the software and configuration. Check our related tools section for more information.