How to investigate upstream timed out issues?

Fri Mar 29 01:36:31 UTC 2013

No it works with port 4443 (I have opened it somewhere else) but am getting
another wget error message:

> wget https://videomail.io:4443/socket.io/socket.io.v0.9.11.js
--2013-03-29 14:35:00-- 
https://videomail.io:4443/socket.io/socket.io.v0.9.11.js
Resolving videomail.io (videomail.io)... 103.6.212.124
Connecting to videomail.io (videomail.io)|103.6.212.124|:4443... connected.
ERROR: cannot verify videomail.io's certificate, issued by
`/C=US/O=GeoTrust, Inc./CN=RapidSSL CA':
  Unable to locally verify the issuer's authority.
To connect to videomail.io insecurely, use `--no-check-certificate'.

It's related to the certificate. No idea what's wrong? How can I examine
this deeper?

Cheers
Michael

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,237385,237924#msg-237924