Sep 13 2015
Apache Proxy Permission Denied 503
You are proxying Apache requests to another server and your browser throw a 503 error back: “Service temporarily unavailable”
Looking at the http logs in /var/log/httpd/ssl_error_log, I am getting
(13)Permission denied: proxy: HTTP: attempt to connect to 192.168.1.250:8080 (*) failed
You may also get:
AH01114: HTTP: failed to make connection to backend
SELinux is most likely enabled and denies Apache from initiating connections to the outside. Either turn off SELinux in /etc/selinux/config
Or better, add a rule exception if you want to keep a higher security level:
# setsebool -P httpd_can_network_connect 1
-P switch makes the change persistant across reboots. You may need to restart Apache:
# /etc/init.d/httpd restart
This error is reported on Apache website.