Additional flush and deletion of user defined chains
Fixed revert to return iptables to initial state
Changes to ssh and www rules; realized that INPUT and OUTPUT are entry points to chains and intial rule must be appended there
Fixed DNS and DHCP rules to properly chain
Removed user variables
Fixed typos with INPUT chains where using sports rather than dports and simillar for OUTPUT chains
Added rules to drop invalid tcp packets: urg, synfin, synrst, xmas, null