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Pertanyaan
Pembaca SuperUser Joseph A. ingin tahu bagaimana server web dapat mengetahui apakah Anda menggunakan akses alamat IP langsung atau tidak:
Some web servers, when accessed using their IP address, return an error that direct IP address access is not allowed. I have been wondering for some time how this works.
Does a browser always resolve the IP address and connect to it? Direct IP address access is just skipping DNS altogether, right? How does a remote server even know that you skipped DNS?
Bagaimana server web tahu jika Anda menggunakan akses alamat IP langsung atau tidak?
Jawabannya
Kontributor SuperUser iAdjunct memiliki jawaban untuk kami:
To answer your question of how it knows, it has to do with what your browser sends the web server. You are right that the system always resolves it to an IP address, but the browser sends the URL you attempted to access in the HTTP header.
Here is a sample header that I found online, modified to look as though you used Firefox on Windows and typed apple.com into the address bar:
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