The error logs indicate that Apache is configured as a reverse proxy to forward requests to http://aisql:3000 (mapped to 10.0.0.63:3000), but the connection is failing due to permission issues. Here's how you can troubleshoot and resolve this issue:

Published Jan. 20, 2025, 4:02 p.m. by cloudblog

Since system is in SELinux enforcing mode, Apache is currently blocked from making outgoing connections to your backend (aisql:3000). To resolve this issue, you need to update the SELinux policy to allow Apache to make network connections.

Steps to Allow Apache to Connect to Backend

  1. Allow HTTPD to Make Network Connections Use the following command to allow Apache (httpd) to make outbound network connections:

    sudo setsebool -P httpd_can_network_connect on
    • The -P flag ensures the change is persistent across reboots.

  1. Test the Connection After making this change, restart Apache:

    sudo systemctl restart httpd

    Then, test the connection again:

    curl -v http://******.190/aiapps/

Verify the Change

To confirm that the httpd_can_network_connect policy has been applied, run:

getsebool httpd_can_network_connect

The output should show:

httpd_can_network_connect --> on

Additional Debugging (if needed)

If the issue persists:

  1. Check SELinux logs for any denials: 
    sudo ausearch -c 'httpd' --raw | audit2allow
  2. Generate a custom policy if required: 
    sudo ausearch -c 'httpd' --raw | audit2allow -M my-httpd sudo semodule -i my-httpd.pp

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