[SOLVED] Permission Denied — Error show in Apache logs when used as a reverse proxy

Error from httpd log:

[Mon May xxxx] [proxy:error] [pid xxxxx:tid xxxxxxxx] (13)Permission denied: AH00957: HTTP: attempt to connect to 127.0.0.1:3000 (127.0.0.1) failed

Solved by running this command:

/usr/sbin/setsebool -P httpd_can_network_connect 1