Forward Proxy config for iPads for soon to go Live site

[IggyDolby]

Hi, I'm an nginx newbie and I need to configure it as an externally
available forward proxy for manually configured iPads running an iOS app to
test a soon to go Live website.
You cannot change host files on an iPad but we can ask our external testers
to configure the proxy settings manually.
The old website is still "live" and has the old IP DNS's but we want to use
the same domain name but pointing to the new IP address.
I have installed nginx-1.4.2-1.el6.ngx.x86_64.rpm and it's up and running
but I need some help in how to get the configuration setup.
I will like to resolve to this domain using the /etc/hosts or any other way
that I could accomplish it and forward the requests to the new site.
We cannot switch the DNS yet or assign a new DNS name to this IP as it's all
ready to go with the original named SSL certs etc
Any help will be really appreciated.
Thanks.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,243438,243438#msg-243438