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They are just scanning the network for open proxy. Your server is safe. But better report them to their ISP before there is a victim.


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There's a few options for you. Take a look: WGET and CURL are installed with some linux distributions. WGET is convenient as it reports the average speed of a download. They can be run on your server if it has linux with the standard utilities installed. That way, you can measure the speed from your server to anything that's remote to it. Ping also ...


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Interesting case, since the page is fairly simple. Firstly, I'd agree with closetnoc's comment that your page is already pretty fast - it's clear you've spent some time working on speed, so any further gains will be micro-optimizations at best. (Faster DNS would certainly help though, as you said.) My pages are served gzipped and I flush the buffers ...


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When you deal with static pages (such as files with the html extensions), header configuration can only be applied to server configuration files, and depending on the server, the configuration options might be limited. For more flexibility without messing up the server, use a server-side scripting language such as PHP. Also, for cache-control, you want to ...


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When an HTML page or content (CSS, JavaScript, images, fonts... etc.) is expired past it's cache control header time, how long do browsers keep the content around to make use of 304 responses? While browsers may keep the content stored on disk in a temporary or cache directory beyond the expiry date/time, the browser will consider it out-of-date ...



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