Nginx Configuration:504 Gateway Time-out error

nginxreverse-proxytcp

We are using Nginx as a Load balancer.
Nginx having IP address of :10.110.0.200 and
address of host machines are 10.110.3.20|10.110.3.21

this is the configuration file:

upstream test1 {   server 10.110.3.20:xxxx; }

server {

  listen               10.110.0.200:80;             server_name test1.xyx.com;

  location /  {
    proxy_set_header Host $host;
    proxy_pass         http://test1;

  }  }

We are getting an error message

*798 upstream timed out (110: Connection timed out) while connecting
to upstream, client: 10.100.88.210

Any leads on this?

When we do curl for

curl -v http://10.110.3.20:xxxx
* couldn't connect to host
* Closing connection #0
curl: (7) couldn't connect to host

Best Answer

Given that you can't connect to the backend directly using curl, the problem isn't an nginx config problem, but instead something lower-level. I'm going with firewall misconfiguration -- it's the catch-all problem in these situations.

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