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The nginx web server allows to use an invalid domain name, like _ as a server name. In such case, we can't deduce a lot of things from the canonical server name defined by the web server. HTTP_HOST is more informative. Reference: https://nginx.org/en/docs/http/server_names.html

The nginx web server allows to use an invalid domain name, like _ as a server name. In such case, we can't deduce a lot of things from the canonical server name defined by the web server. HTTP_HOST is more informative. Ref T1294 Reference: https://nginx.org/en/docs/http/server_names.html

The nginx web server allows to use an invalid domain name, like _ as a server name. In such case, we can't deduce a lot of things from the canonical server name defined by the web server. HTTP_HOST is more informative. Ref T1294 Reference: https://nginx.org/en/docs/http/server_names.html