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Demo php cURL code, that automatically logs into Google AdSense, using cookies and post fields with the POST method.

To make your site even faster, serve certain content from different subdomains. The reason this works is amazingly cool!

If you remove the Last-Modified and ETag header, you will totally eliminate If-Modified-Since and If-None-Match requests and their 304 Not Modified Responses.

By removing the ETag header, you disable caches and browsers from being able to validate files, so they are forced to rely on your Cache-Control and Expires header.

A first-time visitor to your page will make several HTTP requests to download all your sites files, but using the Expires header you make those files cacheable. This avoids unnecessary HTTP requests on subsequent page views.

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After trick
I am often logged in to my servers via SSH, and I need to download a file like a WordPress plugin. I've noticed many sites now employ a means of blocking robots like wget from accessing their files. Most of the time they use .htaccess to do this. So a permanent workaround has wget mimick a normal browser.

Apache Web Server users have problems getting Apache Authentication/password-protection in htaccess working, this is a troubleshooting guide to get Password Protection working!

WordPress blogs show the same duplicate content for https://www.askapache.com/index.php and https://www.askapache.com/. If you've read about using a robots.txt file for WordPress SEO, than you already understand this setup results in Duplicate Content penalties being levied against your Blog and Web Site by Search Engines.