Troubleshooting "Permission denied" when attempting to connect to Redis from PHP script

Question

Port 6379 is open on the server, and I can successfully run telnet localhost 6379 in SSH.

I tried both Predis/phpredis client library in PHP, but it still does not work:

• Predis gives "Permission denied" error when opening socket to 6379.
• phpredis gives "redis server went away".

Answer 1

Problem solved, type:

/usr/sbin/setsebool httpd_can_network_connect=1

By default, SELinux does not allow Apache to make socket connections. More information can be found here.