Internet Edge and Defense in Depth

David Swafford david at
Tue Dec 6 21:37:24 UTC 2011

They're proposing that so you buy their device, not renew support on
your existing ones :-D

Personally we just went through this w/ Palo Alto Networks.  We bought
a handful of their all-in-one firewalls simply for their web-filtering
functionality (replacing Bluecoats).  They pitched repetitively that
we should replace all of our firewalls with just their box and
collapse it.

I must say, from a support perspective, the concept of "this box does
web filtering, and that box handles the firewall of our public facing
servers" is worth it's weight in gold.  Web filtering alone can get
stupid complex if you let it.   Do you really want to troubleshoot an
inbound web server issue while trying to sort through rules like "Jeff
is allowed to get to Facebook, Marketing can get to Twitter, HR can
see everything, oh wait here's the DMZ rules....".

Boxes are cheap in an environment where staffing is lean.  In SoHo,
and smaller SMBs I could see it being different... we're on the larger
of the "medium business" / small Enterprise side of the fence.


On Tue, Dec 6, 2011 at 4:16 PM, Holmes,David A <dholmes at> wrote:
> Some firewall vendors are proposing to collapse all Internet edge functions into a single device (border router, firewall, IPS, caching engine, proxy, etc.). A general Internet edge design principle has been the "defense in depth" concept. Is anyone collapsing all Internet edge functions into one device?
> Regards,
> David
>  ________________________________
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