Everyone had to deal at least once with Varnish, knows this: cookies handling may be your nemesis. But I've just found a useful trick, to publish here as future reference. sub vcl_hash { # Common hashing stuffs set req.http.hash = req.url; if (req.http.host) { set req.http.hash = req.http.hash + "#" + req.http.host; } else { set req.http.hash = req.http.hash + "#" + server.ip; } # Stuffing the hash! if (req.http.Cookie ~ "set_or_not_set_cookie_name") { hash_data("set_or_not_set_cookie_name"); } } This is reccomended…