Recently, I have posted a question, (https://stackoverflow.com/questions/37494896/how-to-save-file-from-url-to-web-server-by-php). And, there is an answer in question.
In this answer, he said: "So the ability to connect to external hosts is blocked by a firewall and is not possible.". Tt nearly means: "There is no way that my server can't get outside data". But, I don't know: "Why Google can get some data from my website, as HTML page, easily?".
I really want to ask: "Why SourceForge's administrators block my web by a firewall? And, Is there any way to pass the firewall, and get some data, with PHP?".