Proxy based on user groups

[fabricionarcizo]

Hello everyone,

That's the first time I use Zentyal in my servers. Although I use it only for 1 week, I liked Zentyal performance a lot.
I couldn't setup the proxy HTTP based on user groups and filter profiles.
When the user try to access a website, the web browser requires the username/password several times. I'd like to setup my proxy to require the login only once per session (or something like that).
Did someone have a problem like this before?

Cheers,