Most basic question regarding rules. In a sonicwall, if we have an interface/subnet that we do not want to have access to any other interfaces/subnets, do I need to set a deny rule for each one, or is the lack of an "allow" rule sufficient?
Another question. Does an Iphelper bypass firewall rules? For example we have an interface/subnet that I specified a Ip helper to an address in the "Lan" zone but also have a rule to deny all access from said interface to "Lan" zone. I have an additional rule with higher priority to allow DHCP only to LAN zone. I'm just curious because while DHCP is working, I don't see a hit counter increment on either of the rules. So basically we are using a DHCP server in the Lan zone rather than sonicwall DHCP server.