On Monday 27 December 2004 07:36 am, Chris Gehlker kindly wrote:
> On Dec 26, 2004, at 9:40 PM, Alan Dayley wrote:
> > Digression: Each IP of a subnet must get it's IP either by static
> > assignment
> > or DHCP.  Static assignment means that a person must configure the
> > computer
> > to have that IP address and must be aware of what the IPs are so as to
> > not
> > assign the same IP to more than one computer.  DHCP means that one of
> > the
> > computers on the subnet is the server and it hands out IP numbers to
> > the
> > other computers on the subnet when they ask for them.
>
> I suppose it's time to ask the fundamental question: What does another
> layer of NAT get you? When this discussion started, I assumed that Siri
> was doing some kind of serving simply because he was paying a premium
> for a static address. I also assumed that IPCop was a port
> forwarding/packet sniffing firewall that he needed because he had some
> open ports through his firewall to facilitate netmeeting or some such.

We're not doing anything complicated. Our office has a website it's developing 
that will be interactive (forums for our tenants/customers), but no real need 
(that I know of) for double layer of NAT except my boss wants to keep it.
>
> As the discussion has proceeded, it sounds like IPCop is doing NAT
> behind a Linksys that is also doing NAT and that neither has any open
> ports. If this is correct, I don't see the point. Can someone outline a
> scenario where a second level of NAT provides meaningful additional
> protection?

I'd be curious to know this, too. 
>
> BTW I'm also behind two levels of NAT, but only because my DSL modem
> and my wireless A/P have built in routers.
> --
> It is difficult to get a man to understand something when his salary
> depends upon his not understanding it.
> -Upton Sinclair, novelist and reformer (1878-1968)
>
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