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Enable HTTP compression for Apache HTTP SERVER

Edit httpd.conf to enable compression for Apache HTTP server
Most likely, it is under

Copy and Past the following to the bottom of the file and restart Apache.

LoadModule deflate_module modules/mod_deflate.so

<IfModule mod_deflate.c>
        #DeflateCompressionLevel 9
        <Location />
                AddOutputFilterByType DEFLATE text/html text/plain text/css text/xml
                <IfModule mod_headers.c>
                        Header append Vary User-Agent
                </IfModule>
        </Location>
        BrowserMatch ^Mozilla/4 gzip-only-text/html
        BrowserMatch ^Mozilla/4\.0[678] no-gzip
        BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
        BrowserMatch "MSIE" AuthDigestEnableQueryStringHack=On
</IfModule>

HTTP header “Vary User-Agent” and the “BrowserMatch” indicate that the compression decision is made on the type/version of the browser, the rules have been configured at BrowserMatch.

For example,

BrowserMatch ^Mozilla/4 gzip-only-text/html
Netscape 4.x has some problems with decompressing content with content-type other than text/html.