Although I cannot afford the paid version of ZoneAlarm firewall I want to ensure I'm getting the most out of my free version. However, there are four options in the advanced settings that I do not understand. After selecting firewall then advanced options there are four labeled, "Block Trusted Zone Servers", "Block Internet Zone Servers", "Allow Outgoing DNS/DHCP in Trusted Zone on High setting" & "Allow Outgoing DNS/DHCP in Internet Zone on High setting". What do these mean exactly, what do they allow or block? At the moment their all unchecked so I'm not sure if that's how it should be or if changing any would make my computer anymore secure. Can anyone help me answer this?