このエラーメッセージに関する原因と対処に関して説明します。
エラーメッセージ(英語)：
cannot access website
対処
関連リンク
Cannot access website on EC2 web server - Stack Overflow
https://stackoverflow.com/questions/46964053/cannot-access-website-on-ec2-web-server
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http://www.webhostingtalk.com/showthread.php?t=1514521
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https://serverfault.com/questions/880623/jenkins-ec2-plugin-http-error-404
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https://serverfault.com/questions/759650/cannot-access-a-folder-without-using-the-port
AWS Developer Forums: Tag: php
https://forums.aws.amazon.com/tags/php