hi All,
Newbie to nginx, and been trying to search high and low for this particular way of configuration. Here is what I plan to do

1) Setup a nginx forward proxy, and this particular proxy server will only accept the proxy connection based on destination website, for example,
I want to setup this nginx to proxy for 5 website, eg , lets call this proxy server PROXY_AAA
a) www.nginx.com
b) www.nginx.org
c) www.freebsd.org
d) www.php.net
e) www.mariadb.org

2) I will setup this proxy server in cloud server provider

3) I will need to create a PAC file, and let my users to use this particular proxy PAC file for traffic re-direction, user will have to configure their browser to use proxy PAC file.

4) Whenever my users (that are using the PAC file) trying to access to the above 5 website, regardless of using HTTP or HTTPS, the proxy PAC file will get the traffic flow through my PROYX_AAA server, any other website that the user access, the traffic will go direct via exiting connection (meaning it will not send through my PROXY_AAA).

5) I also need to configure the PROXY_AAA to proxy for the above 5 website only, and block any other website or refused the connection request to access any other website, as I want this proxy server will only proxy for the domain that I configure/allow, not any other website. This is also to avoid other users to force their traffic through my proxy server.

6) Proxy connection based on source IP address is not possible, as the users IP is dynamic and changes over time. My proxy will accept any source IP, and will proxy only for the few website that i configure. The proxy PAC file help to decide the traffic should send to my proxy or direct connection.

So would like to ask anyone has configure such config in nginx before ? How do I configure the nginx as forward proxy, to block all proxy request, and allow only the few website that I want to proxy ?

HL.