I encountered this problem after updating PHP to 5.5.12. I use Nginx with PHP5 FPM and after the updating PHP I was seeing 502 Gateway Error pages. Nginx’s error log file (
/var/log/nginx/error.log) had the following in it:
2014/05/08 06:22:24 [crit] 24538#0: *292759 connect() to unix:/var/run/php5-fpm.sock failed (13: Permission denied) while connecting to upstream, client: 18.104.22.168, server: websistent.com, request: "GET /wordpress-custom-403-401-error-page/ HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "websistent.com"
It was clear that Nginx couldn’t access PHP FPM’s socket file due to insufficient permissions. But everything was working fine till I updated PHP so something had changed in version 5.5.12.Continue Reading…