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13.4.4. Changing port numbers

Depending on policy configuration, services may only be allowed to run on certain port numbers. Attempting to change the port a service runs on without changing policy may result in the service failing to start. Use the semanage utility as the root user to list the ports SELinux allows httpd to listen on:
~]# semanage port -l | grep -w http_port_t
http_port_t                    tcp      80, 443, 488, 8008, 8009, 8443
By default, SELinux allows http to listen on TCP ports 80, 443, 488, 8008, 8009, or 8443. If /etc/httpd/conf/httpd.conf is configured so that httpd listens on any port not listed for http_port_t, httpd fails to start.
To configure httpd to run on a port other than TCP ports 80, 443, 488, 8008, 8009, or 8443:
  1. Edit the /etc/httpd/conf/httpd.conf file as root so the Listen option lists a port that is not configured in SELinux policy for httpd. The following example configures httpd to listen on the 10.0.0.1 IP address, and on TCP port 12345:
    # Change this to Listen on specific IP addresses as shown below to 
    # prevent Apache from glomming onto all bound IP addresses (0.0.0.0)
    #
    #Listen 12.34.56.78:80
    Listen 10.0.0.1:12345
    
  2. Run the following command as the root user to add the port to SELinux policy configuration:
    ~]# semanage port -a -t http_port_t -p tcp 12345
  3. Confirm that the port is added:
    ~]# semanage port -l | grep -w http_port_t
    http_port_t                    tcp      12345, 80, 443, 488, 8008, 8009, 8443
    
If you no longer run httpd on port 12345, use the semanage utility as root to remove the port from policy configuration:
~]# semanage port -d -t http_port_t -p tcp 12345