I am not sure exactly what you mean here. The default action is to block on all firewalling tabs except for Floating. So your block rule at the bottom is redundant unless you have special options set. So you are only going to allow certain ports through. First, if it doesn't need to be open, don't open it. using alias grouping is ideal for that. put all your web servers in an alias and then open a port 80 for that alias. If your servers are not running on port 80 and you open it, traffic sould be allowed to the server if the firewall port is open, there will not be any to respond.
In 1:1 NAT there isn't a way to tie a rule to a VIP other than putting it in a rule manually. It doesn't work like port forwards.