Re: regarding firewall discussion

[rhkramer@gmail.com]

> mick crane <mick.crane@gmail.com> wrote:
> > regarding firewall discussion I'm uncertain how firewalls are
> > supposed to work.
> > I think the idea is that nothing is accepted unless it is in response
> > to a request.
> > What's to stop some spurious instructions being sent in response to
> > genuine request?

Just for the record, what you described (nothing is accepted unless it is in 
response to a request) is more like the way that NAT worked (at least in its 
original incarnations).  (I say it that way because I haven't kept up with 
NAT, so don't know how it may have changed).