Re: Internet Sharing through NAT

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How to forward to a public DNS? I couldn't ping any public IP address from
internal laptop, So i don't think "nslookup" gonna work anyway.

i can ping any public IP address and browse any public websites from my
server2003. my internal laptop can access server2003, it can ping internal
nic(192.168.1.1) also can ping external nic(10.0.0.1). because NAT allow all
internal computers to share one external ip address, I don't know why it
cannot ping any public ip addresses.

"Bill Grant" wrote:

> The only thing I have seen cause this was a default gateway configured
> on the private NIC. Only the public NIC should have a gateway address
> configured.
>
> There is really no need for static routes. All that is necessary is that
> the client uses the server's private NIC as its default gateway. All
> non-local traffic will be sent to the server, and NAT should then take over
> and route it to the Internet.
>
> Using an address pool just lets you use automatic IP assignment on the
> client. If you only have one or two clients you might as well configure them
> manually.
>
> Have you modified DNS to forward to a public DNS? If so, can you resolve
> public URLs from the client (using nslookup)?
>
>
> hhubbo wrote:
> > Yes, I rebooted my server a couple of times. i wonder if i should
> > setup static route or address pool?
> >
> > "Bill Grant" wrote:
> >
> >> That should be all you need. Have you tried a reboot of the server?
> >>
> >> hhubbo wrote:
> >>> yes, the public interface is 10.0.0.1, and 192.168.1.1 is private
> >>> interface.
> >>>
> >>>
> >>> "Bill Grant" wrote:
> >>>
> >>>> In that case you probably haven't configured NAT correctly. Do
> >>>> you have the 10.0.0.1 configured as the public interface and
> >>>> 192.168.1.1 configured as the private interface in NAT?
> >>>>
> >>>> hhubbo wrote:
> >>>>> Sorry Bill, maybe i didn't explain clearly, I can ping the ip
> >>>>> address of external nic from the laptop, which mean i can ping
> >>>>> 10.0.0.1 from 192.168.1.2, but i can't ping any external public
> >>>>> IP.
> >>>>>
> >>>>> "Bill Grant" wrote:
> >>>>>
> >>>>>> Since you are running AD, the problem is probably DNS. If you
> >>>>>> can ping an external public IP, NAT is working.
> >>>>>>
> >>>>>> Set the DNS on your server to forward to a public DNS
> >>>>>> service. Then set both your server and the client laptop to use
> >>>>>> 192.168.1.1 for DNS . (The latter step is required for AD to
> >>>>>> work properly). Check that it works by doing an nslookup from
> >>>>>> the server and the laptop (eg nslookup www.microsoft.com ).
> >>>>>>
> >>>>>> hhubbo wrote:
> >>>>>>> I have a 2003 server which is domain Controller. It has DNS,
> >>>>>>> DHCP and RRAS enable with NAT. There are two nics installed. one
> >>>>>>> connect to an ADSL modem, another is connected with a internal
> >>>>>>> laptop. the laptop can ping external IP but cannot browse
> >>>>>>> internet. How should I do to configure NAT?
> >>>>>>>
> >>>>>>> External IP: 10.0.0.1
> >>>>>>> Mask: 255.255.255.0
> >>>>>>> Gateway: 10.0.0.138
> >>>>>>>
> >>>>>>> Internal IP: 192.168.1.1
> >>>>>>> Mask: 255.255.255.0
> >>>>>>>
> >>>>>>> Laptop: 192.168.1.2
> >>>>>>> Mask: 255.255.255.0
> >>>>>>> Gateway: 192.168.1.1
>
>
>
.

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