I could do with some guidance an the task to:-
'Disable ICMP across the DMZ and allow only established connections into the internal network.'
I have created access list as follows
access-list 103 permit tcp any any established
access-list 103 deny icmp any any echo
access-list 103 deny ip any any
and applied to interface fa0/0 in the inbound direction on the Admin-MDF router.
Am I missing something? Any clues appreciated as I am well and truely stuck.