How to check my IP???

[Tony Alfrey]

Bill Campbell wrote:
<snip>
> 
> 
> As Kurt and other explained, your Airport box gets an IP from
> your cable provider which is visible to the outside world, and is
> what it uses to send/receive IP packets to the 'Net.  The Airport
> has a private set of IP addresses in the 10.0.1.x range, and
> assigns private IP addresses from that using the DHCP protocol.
> 
> I haven't used any of the Airport boxes, but I assume that they
> have a web-based configuration utility that will show you the
> range of IP addresses assigned by DHCP, and other configuration
> parameters for the WAN (Wide Area Network, aka Internet) side of
> the box.

Yes.  Very idiot-proof.

> 
> The WAN ip address of the Airport is assigned a public address by
> Comcast using DHCP.  Other broadband providers may use different
> methods which the broadband provider should be able to explain.
> 
> If you have boxes that you want to have on fixed IP addresses on
> the 10.0.1.x private side (printers or whatever where you you don't
> want their IP address to change), you should look at the range of
> IP addresses the Airport is assigning via DHCP, and assign the
> fixed IP addresses outside of that range.  Make sure that you
> don't assign anything to the Airport's address, probably the
> lowest address, 10.0.1.1.

It's interesting but the Apple Airport box won't let me assign fixed 
addresses (even within a range of 10.0.1.x ) on the Apple side if I 
don't have a fixed IP address on the cable side.
In other words:
Cable (WAN) Side      Apple Side
Static                Static, DHCP with NAT or DHCP without NAT
Dynamic               DHCP with NAT only

But it's OK; my neighbor can connect with his Toshiba box to my network 
so I now simply have to point my tenant in the direction of my neighbor 
and say "Well, HIS box connects  ;-)"

Thanks all for the info!



-- 
Tony Alfrey
tonyalfrey at earthlink.net
"I'd Rather Be Sailing"