2

In my configuration, I use Haproxy mainly for reverse proxy.

I installed Squid Proxy in my private lan and I can access it from external with port 3128. But I use the basic authentification ncsa and the headers is not crypted so my login is vulnerable. I want to forward my proxy by haproxy.

[Client]->proxy.example.net->[haproxy:443 ssl]->[squid:3128]

I added in my haproxy configuration a new backend:

frontend www-https
    bind *:443 ssl crt /etc/haproxy/ssl/fullchain.pem no-sslv3
    log global
    mode http
    use_backend proxy-squid if { ssl_fc_sni proxy.example.com }
    use_backend default if { ssl_fc_sni example.com }
    default_backend default

backend default
    option forwardfor
    server d8-apps 127.0.0.1:8000 #nginx

backend proxy-squid
    mode http
    option forwardfor
    option http-server-close
    server d8-apps 127.0.0.1:3128

My default backend and other works fine but not proxy-squid. I realized a "tcpdump -nX -vv -i lo port 3128" during my request and nothing.. and with the port 443, I see many packets with incorrect checksum.

In Wireshark, I do not see the ssl handshake like when I accessing example.com (default backend). I just see the 3-way handshake tcp followed by FIN, ACK.

I think Haproxy do not understand my real request when I set the proxy in my browser config. So, is it possible to realize that with a specific configuration?

Thanks!

0

HTTP contains several different message syntaxes which are used in different situations. The messages sent to a server (or reverse-proxy) are quite different to those sent to a proxy.

Since you have haproxy setup to operate as a reverse-proxy it does not permit the messages the browser needs to setup an HTTPS tunnel.

Since all you are really trying to do is secure your connections to the Squid I suggest you simply make it listen on an https_port for connections from the browser. That will need a TLS certificate setup with the proxies public hostname of course. Note that this is not the same cert detail as used for a reverse-proxy (which uses the origin server domain name).

Firefox and Chrome apparently support TLS to an explicit proxy when configured to use it via a PAC file or the https_proxy= environment variable. In both cases the proxy URI should use https:// scheme where traditionally one would put http:// scheme.

(I say apparently because I've not tried it myself yet. Others have had mixed results, but the browser people keep saying that its possible).

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.