indeed, adding rule in "domain category" adds ACL in squid.conf
So you have 2 choices, as far as I understand:
- either you try to hack deeply Zentyal so that domain and URL control is delegated to Dansguardian (I would not do this without closer investigation
- or, easier, you lightly hack squid.conf to display custom error page when acl controlling social networking is involved (using
deny_info ERR_PAGE_NAME acl_name)
syntaxHowever if you have a lot of different categories and do want to stick on this approach, this can be painful or at least heavy.