iptables

[Tom H]

On Sat, Dec 8, 2012 at 10:26 AM, JD <jd1008 at gmail.com> wrote:
> On 12/08/2012 06:12 AM, Tom H wrote:
>>
>> The default gateway should be provided by dhclient.
>>
> Except, when I configured  my interfaces, I use manual and
> not dhcp because all the other machines' scripts are coded
> to talk to this machine using pre-specified IP addresses.
>
> During configuration, I specify the ip addresses of the machine,
> the netmask, the gateway and the dns server and the search domain.
> I do this for both the wireless and the wired.
>
> This is also important because the router is programmed to route
> certain incoming requests on certain ports to the specific IP address
> of this machine.

Sorry, I assumed dhcp...

For the upstream dns servers: I've never used NM with dnsmasq,
resolvconf, and a static ip address! I would've liked to test the
following before posting but I don't have an Ubuntu box available
right now. NM runs its own version of dnsmasq and, AFAIK, picks up its
config from "/etc/NetworkManager/dnsmasq.d/". dnsmasq has a "server="
configuration option so you could set that to an upstream dns server.
Make sure that you chmod the file to 0600 or 0700 because NM usually's
strict about file modes.

For the default gateway: Have you checked the ipv4 settings in the NM
applet? If you choose static, you have to enter ip address, netmask,
and *gateway*.