經過一番檢查以及google,應該是SeLinux的導致的。可以選擇一些兩種方式進行：
1、關閉SeLinux,可以查看以下文章：
2、執行下面的命令
setsebool -P httpd_can_network_connect 1
原文地址：
解決Nginx的connect() to 127.0.0.1:8080 failed (13: Permission denied) while connect
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