RE: Firewall opinions wanted please

["Matt Ryan" <Matt.Ryan () telewest co uk>]

Depending on your chosen vendor the ACL cost is unlikely to be $0 - if you
steal CPU cycles from packet forwarding then you incur earlier router
upgrade costs and that has a NPV cost increase associated with it. It's just
not as obvious as a invoice for a firewall.


Matt.

-----Original Message-----
From: owner-nanog () merit edu [mailto:owner-nanog () merit edu]On Behalf Of
Eric Gauthier
Sent: 17 March 2004 17:20
To: nanog () merit edu
Subject: Re: Firewall opinions wanted please



> > _Everyone_ (network connected) should have a firewall.  My grandma
should 
> > have a firewall.  Nicole, holding dominion over this business network
and 
> > its critical infrastructure, should _definitely_ have a firewall.  ;)

By "firewall", do you mean "dedicated unit that does statefull filtering"
or just "something that will block packets"?  We've successfully argued
to just about every group here at our University who came to us asking for a

"firewall" that, given what they wanted to achieve, they could accomplish
the 
same thing with simple ACLs...  

I'm sure that the cost of the ACL's (i.e. $0.00) versus the cost of a
firewall 
also helped them in their decision...

Eric :)

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