I haven't set up firewalls in ages but if I recall correctly I was always doing:

>From the internet inbound to the company: Last rule is "drop all"
>From the corporate network to the internet: Last rule is "accept all"
In and out of the DMZ was (IIRC): last rule is "drop all" for inbound
and outbound.

On the other hand, some companies are not as easy going about
permitting outbound traffic from their corporation.  I could see a
bank or other institution having a 'drop all' last rule for outbound.

Tom


On Thu, Mar 22, 2012 at 1:25 PM, Paul Graydon <[email protected]> wrote:
> Aloha,
>
> I was tasked with clearing up some ambiguities in our firewalls.  Nothing
> too major, just some irritating stuff for the most part (commenting all the
> rules etc), but I got to wondering:
>
> Which is better practice, to have an explicit Deny / Deny at the end of an
> access list, or leave it to the implicit one?
>
> Paul
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