allow any to any then create specific rules

hi all,

atm what i have done works but i was wondering instead of having a network alias called "allnet" (bottom rule as source) can i change it to * ie any as i think this would work the same wouldnt it?

and the two block rules above the any rule, can i just have one block rule ie perimiter to internal and will it work visa versa aswell? (dont think it will so i have done two block rules for visa versa)

cheers,

rob