I confirm that Endian Firewall Community 3.2.2 Proxy not-transparent does not work.
After having completely re-entered all the HTTP Proxy rules starting from a completely new EFW 3.2.2 installation I discovered that with 25 rules Proxy not-transparent rejects all attempts to connect to any URL. But when removing half of the rules, more specifically those with a large number of domain names specified, it works again !!!
Which is boring is that in revision EFW 2.5.2 those 25 Proxy rules are working perfectly, including those having a large number of domain names.
So what is the interest of this 3.2.2 revision
