Request: upstream via a SOCKS proxy

姚伟斌 yaoweibin at
Fri Jan 25 03:45:32 UTC 2013

I have no idea about the SOCK4a/SOCK5 protocol. Is it similar with the tcp
proxy module?

2013/1/24 Tom van der Woerdt <info at>

> Hi,
> A project I'm working on has a backend server that, for security reasons,
> can only be accessed via a SOCKS4a/SOCKS5 proxy. A frontend server for this
> project (nginx) has one simple task: to proxy all incoming connections to
> the backend server.
> Right now, nginx cannot do this, because it has no support for proxying
> upstream connections via a SOCKS proxy. The current temporary workaround is
> to run another service on the frontend machine that acts like a HTTP server
> but proxies the data to the backend - basically everything I'd like nginx
> to do. I cannot use this service as my main frontend, because there are a
> few other files that also need to be served.
> SOCKS4a and SOCKS5 are really easy protocols and are basically just
> sockets but with an alternate handshake (skip the DNS lookup, send the
> hostname to the socket instead). Since they should be so easy to implement,
> I'm requesting that on this mailing list.
> I was thinking of a config file that would look something like this :
>     upstream backend {
>         server hidden_dns.local socks4=;
>     }
>     server {
>         location / {
>             proxy_pass http://backend;
>         }
>     }
> As far as I'm aware, this feature wouldn't break anything, since a SOCKS
> connections behaves just like any other normal socket.
> Thanks for considering,
> Tom van der Woerdt
> ______________________________**_________________
> nginx-devel mailing list
> nginx-devel at

Weibin Yao
Developer @ Server Platform Team of Taobao
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