SELinux is preventing /usr/sbin/httpd from name_connect access on the tcp_socket.
A quick fix is to allow HTTPD scripts and modules to connect to the network using TCP, i.e., run the following,
sudo setsebool -P httpd_can_network_connect 1
By the way, the relevant system information is as follows,
- Operating System (output of
- SELinux Policy Module:
selinux-policy.noarch, version 3.12.1-74.17.fc19