How to disable/not to send Last-Modified Header

Igor Sysoev igor at
Fri Mar 12 00:00:08 MSK 2010

On Thu, Mar 11, 2010 at 12:08:43PM -0500, tunggad wrote:

> We are using NGINX to front end Jetty Server, serving static content is done by NGINX and we want to disable/remove the Last-Modified Header.
> The Reason why we want to disable this header is to eliminate validation requests If-Modified-Since. The build process automatically changes the filename of the static artefacts every when we deploy new version, so these validation requests are not necessary.

Disabling If-Modified-Since validation:

     if_modified_since  off;

Removing Last-Modified header:

     add_header  Last-Modified  "";

However, I do not see why If-Modified-Since may hinder if you generete
unique names.

Igor Sysoev

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