I see several of them: what is the commended one to use? I am looking for something stable and easy to configure.
Keep in mind that with the ongoing proliferation of ssl/ tls, proxies (including transparent ones) are losing quite a bit of their inherent use. With https sources you simply can't cache anything (the proxy can just pass it through/ connect), nor apply any kind of filtering or analytics.
Thx; that was my suspicion that you confirmed...