I am new in this version of linux zeroshell.
Before I know the Zeroshell I used Debian as server, now use the Zeroshell. However I used the Squid to block access to certain sites. In Zeroshell not know if I have this tool or you have another that allows me that.
Thanks, and sorry my English, which is not very good.
You can also use the Dansguardian add on to block content, works great in 12, and is a quick install. after install it will b located in the HTTP proxy, a new button appears
You can also use opendns as forwarders for ZS. With OpenDNS you can block navigation. Configuration is easy with dashboard on opendns site.
This configuration works without activating the proxy on ZS.