ETags (Entity Tag) are hash generated based on inode number, last modified time, or file size. It improves cache validation and saves data bandwidth. However, if your website used multiple back end servers, then it might result in differing ETag values across different servers, and slow down your website. In that case, you might want to disable ETags on your website. Here’s how to disable ETags in NGINX.
Please note : It is not advisable to disable ETags on your website. It can mess up caching.
How to Disable ETags in NGINX
Here are the steps to disable ETags in NGINX.
1. Open NGINX config file
Open NGINX config file in a text editor.
You will find it at one of the following locations, depending on the type of installation
/etc/nginx/conf.d/default.conf /etc/nginx/sites-enabled/default /etc/nginx/nginx.conf
$ sudo vim /etc/nginx/nginx.conf
2. Disable ETags
You can disable ETags on your website by simply adding the following line in http block of your website.
3. Reload NGINX web server
Test the config file to ensure there are no errors.
$ sudo nginx -t
If you get no error message, reload NGINX server to apply changes.
$ sudo service nginx reload
That’s it! Now NGINX will automatically disable ETag on your website.