NGINX upload error: 413 Request Entity Too Large

Symptoms

When a user attempts to upload a large file, you might encounter the following error message:

CONFIG_TEXT: 413 Request Entity Too Large

Cause

The NGINX configuration needs to be adjusted to accept larger files.

Resolution

1. Create a folder for the user, ensuring "USER" is replaced with the cPanel user:

   # mkdir -p /etc/nginx/conf.d/users/USER

2. Create the file for the configuration options to reside in, replacing FILENAME with a valid file name that does not begin with "cpanel-":

   # touch /etc/nginx/conf.d/users/USER/FILENAME.conf

3. Place the following line within the newly created file, adjusting the value according to your needs:

   CONFIG_TEXT: client_max_body_size 32M;

4. Rebuild the Nginx configuration for the user, ensuring "USER" is replaced with the cPanel user:

   # /scripts/ea-nginx config USER

Note: You may also need to adjust the upload limits for ModSecurity and PHP. You can view details on how to do so in the following support articles:
PHP File upload failed (Request Entity Too Large) [ModSecurity]
How to increase the maximum file upload size limit in PHP

Additional Resources

The ea-nginx Script

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