Nginx Can't get the request port when doing proxy

[Maxim Dounin]

Hello!

On Thu, Nov 24, 2011 at 05:16:04AM -0500, higkoo wrote:

> such as :
>     Client(192.168.1.101) want visit http://192.168.1.201:9000/myfile
> example,and need visit other ports.
>     but client must use proxy to visit. Nginx is the proxyer!
> 
>     Nginx proxy running on 192.168.1.202 and listen at  port 8080 .
>         I use '''proxy_pass $scheme://$host$request_uri;''' to make
> proxy,but I get http-502 when I use this proxy-server.
>     Becase nginx use the default port 80 to proxy:
>         | request = http://192.168.1.201:9000/myfile
>         | proxy-server = 192.168.1.202 8080
>         | proxy-to  = http://192.168.1.201:80/myfile       
>     There are only $remote_port and $server_port on nginx-variables:
> http://wiki.nginx.org/HttpCoreModule#Variables
> 
>     If I just want visit port 9000 on 192.168.1.201,I can write by
> '''proxy_pass $scheme://$host:9000$request_uri;'''
>     But it's not a good idea ,and there are some other port to use.
> 
>     How can I do ?

Just a side note:

nginx isn't forward proxy, it's reverse proxy.  By using nginx as 
a forward proxy you are looking for problems, including security 
ones.

Maxim Dounin