[squid-users] Squid CONNECT tunnel

[roee klinger]

Hey,

I am trying to use Squid with FTP server TCP Port Multiplexing, on the FRP documentation (https://github.com/fatedier/frp#tcp-port-multiplexing), it says:

> quote_type
> frp supports receiving TCP sockets directed to different proxies on a single port on frps, similar to vhost_http_port and vhost_https_port.
>
> The only supported TCP port multiplexing method available at the moment is httpconnect - HTTP CONNECT tunnel.
>
> When setting tcpmux_httpconnect_port to anything other than 0 in frps under [common], frps will listen on this port for HTTP CONNECT requests.
>
> The host of the HTTP CONNECT request will be used to match the proxy in frps. Proxy hosts can be configured in frpc by configuring custom_domain and / or subdomain under type = tcpmux proxies, when multiplexer = httpconnect.
>
> In the above configuration - frps can be contacted on port 1337 with a HTTP CONNECT header such as:
> CONNECT test1 HTTP/1.1\r\n\r\n
>
> and the connection will be routed to proxy1.


I have been struggling to find info about the use of CONNECT tunnels in Squid, the only page that seems to be talking about it is this: https://wiki.squid-cache.org/Features/HTTPS, and the link it points to is broken.

My question is, how can I use this with Squid? Can I configure Squid to receive traffic and then send it out to FRP with a custom CONNECT header?

I am not sure if this is only good for web servers, or if upstream proxy servers can use this method too.


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