I’m trying to do an Nginx-Varnish-Nginx sandwich. Any ideas where I’m going wrong? https://t.co/x126UmSbvo. I just get a 502 error :/

I’m trying to do an Nginx-Varnish-Nginx sandwich. Any ideas where I’m going wrong? https://t.co/x126UmSbvo. I just get a 502 error :/ … http://twitter.com/ryanhellyer/status/783822998176497664