I have a couple websites I limit access to with apache .htaccess files. I also use Google Chrome on my iPhone, and for some reason, it was being blocked even though I specifically allow my internal subnet. Looking at the logs, I saw the request was coming from IP 66.249.84.145, or google-proxy-66-249-84-145.google.com. Ah! There’s a Data Saver feature in Chrome on iOS (guessing it’s there for Chrome on Android too). The iOS Chrome uses a Google proxy to download the webpage, do some compression/minification/etc, and then send it to the phone. They call this “Data Compression Proxy“. According to the App, it saves me about 20% of my data (which, I don’t care about when on Wifi, but on cell, it’s not a bad idea).