ASA ACL question

I have just started to learn ASA firewall. The question is:

1- For higher security interface to access lower security interfaces, no ACL
is required. No I tried this in lab. but I am unable to get a reply/access the
host on outside interface until an ACL for host to inside is applied on
outside interface inbound.

2-
Can any one explain!!!

Thanks
Khalid
Received on Tue Jun 02 2009 - 16:48:26 ART