nginx 绑定本机服务，提示 *451 connect() to failed (13: Permission denied)

现状

nginx 绑定本机 127.0.0.1:23333 结果提示502 Bad Gateway error_log 日志报错

*451 connect() to 127.0.0.1:22335 failed (13: Permission denied) while connecting to upstream

问题原因

开启了selinux

解决办法

setsebool -P httpd_can_network_connect 1

参考方案：https://stackoverflow.com/a/24830777