Questions about NAT and subnets.


Say my address is 10.11.0.62
my subnet mask is 255.255.254.0

So, the fact that my address starts in a 10, makes me think I'm using
NAT. My question is, if I am using NAT, is my network address
calculated the same as usual with the subnet mask?

Meaning, my network address is now 10.11.0.0?

I was just wondering if using NAT changes the way subnets are done,
since that is really only an internal address. thanks.

In article <1176136238.060708.161010@b75g2000hsg.googlegroups .com>,
Doug <douglass_davis@earthlink.net> wrote:

>Questions about NAT and subnets.

>Say my address is 10.11.0.62
>my subnet mask is 255.255.254.0

>So, the fact that my address starts in a 10, makes me think I'm using
>NAT.

You might be using NAT, but that would be a step "outside" of the
above network.

>My question is, if I am using NAT, is my network address
>calculated the same as usual with the subnet mask?

>Meaning, my network address is now 10.11.0.0?

Your network address for the network you are using is exactly the
same when you use NAT. It is something outside your local network
that is doing the address translation. The public address that you
are being translated -to- might have a completely different netmask,
but that won't affect how your local communications happen.

On Apr 9, 12:41 pm, rober...@hushmail.com (Walter Roberson) wrote:
> In article <1176136238.060708.161...@b75g2000hsg.googlegroups .com>,
>
> Doug <douglass_da...@earthlink.net> wrote:
> >Questions about NAT and subnets.
> >Say my address is 10.11.0.62
> >my subnet mask is 255.255.254.0
> >So, the fact that my address starts in a 10, makes me think I'm using
> >NAT.
>
> You might be using NAT, but that would be a step "outside" of the
> above network.
>
> >My question is, if I am using NAT, is my network address
> >calculated the same as usual with the subnet mask?
> >Meaning, my network address is now 10.11.0.0?
>
> Your network address for the network you are using is exactly the
> same when you use NAT. It is something outside your local network
> that is doing the address translation. The public address that you
> are being translated -to- might have a completely different netmask,
> but that won't affect how your local communications happen.

interesting. thanks. i'm still trying to figure this stuff out, i've
been reading but still don't understand totally.


so, there's two things going on here, i have a network address, which
packets are addressed to from the outside, then internally, i have a
subnet mask that is used to further divide up the network. is there
any way for an average user to tell what their network address is (say
from looking at info from ipconfig /all in Windows)?

Is there any way for an average user on a given host to tell how many
subnets the network has been divided into? I don't know if I would
have enough information.

In article <1176161402.278176.237170@n59g2000hsh.googlegroups .com>,
Doug <douglass_davis@earthlink.net> wrote:
>is there
>any way for an average user to tell what their network address is (say
>from looking at info from ipconfig /all in Windows)?

If they want to know what IP address the public will see them as, then
whatsmyip.org

>Is there any way for an average user on a given host to tell how many
>subnets the network has been divided into?

No.