http 404 when switching to a different proxy

Context: I have a Cloudfoundry app running on Ruby 3.0. I'm using a forward proxy to access an external API and that proxy is going away soon so I have to switch to a new service. Problem: When I switch I receive a 404 error.

The new proxy admin says he doesn't see anything coming when I get the 404 error. When I use curl, I can access the URL through the new proxy and the admin can see it.

I was using Net::http on ruby 2.x, I upgraded to ruby 3.0 and moved to httpclient, then Faraday, same issue.

error: /home/vcap/deps/0/vendor_bundle/ruby/3.2.0/gems/net-http-0.6.0/lib/net/http/response.rb:277:in `error!': 404 "Not Found" (Faraday::ConnectionFailed)

Right now my tests consist of a simple GET on https://www.google.com because th eresult is the same, http 404.

@proxi = { uri: "#{get_config.proxy.protocol}://#{get_config.proxy.hostname}:#{get_config.proxy.port}", user: "#{get_config.proxy.username}", password: "#{get_config.proxy.password}" } conn = Faraday.new( proxy: @proxi ) do |faraday| faraday.response :logger, ::Logger.new(STDOUT), { headers: true, bodies: true, errors: true } faraday.adapter Faraday.default_adapter end response = conn.get("https://www.google.com") do |req| req.headers['Content-Type'] = 'application/json' end

Proxy object is correct, and the values are taken from the environment where I run the app, the same parameters that work with curl. The only difference I see between the old and the new proxy is that the url is using https signed with an internal certificate. But if I had a handshake issue I guess I would have a different error?

I'm not sure where to get from there. Any idea?