Re: Netbook emergency router; default route question

[Ron Leach]

Ulot, Richard, Dimitris, thanks for the advice,

On 06/04/2012 16:46, Ulot Olhado wrote:
> You should only have one default gateway that "points" to the internet.

Yes, I was trying to achieve that.  I use XFCE and the network manager 
applet seems 'not' to let me edit the eth0 connection so that the IF 
detail is, for example:

192.168.0.66
255.255.255.0
<blank for gateway>

Instead, the applet doesn't let me 'apply' the settings unless the 
gateway field is filled in.

Then, if the gateway field is filled in, the netbook treats the eth0 
gateway address as the default route, instead of using the wlan0 
gateway entry as the default route.

I think I understand what I need to achieve, I'm just having 
difficulty using the setup utilities.
> You can use the route command at the cli to see your routes there.
> Removing the default gateway on the eth0 device will probably solve you
> problem based on what you said.

$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref 
Use Iface
192.168.13.0    *               255.255.255.0   U     2      0 
0 wlan0
192.168.0.0     *               255.255.255.0   U     1      0 
0 eth0
default         192.168.0.190   0.0.0.0         UG    0      0 
0 eth0

As I mentioned, I don't seem to be able to remove the gateway entry 
from eth0.

At one time, I used to use firestarter which allowed me to explicitly 
assign the 'internet' port, and the port for 'local network' access. 
In system-config-firewall I don't seem to be able to do that; I had 
set 'masquerade' thinking that might cause the same effect, but 
obviously not.

I'm going to search the internet for how to do this at cli level - I 
will post back.

Thanks again for the help.

regards, Ron

Netbook emergency router; default route question

[Ron Leach]

On 07/04/2012 18:59, Ron Leach wrote:
> As I mentioned, I don't seem to be able to remove the gateway entry
> from eth0.
>
> At one time, I used to use firestarter which allowed me to explicitly
> assign the 'internet' port, and the port for 'local network' access.
> In system-config-firewall I don't seem to be able to do that; I had
> set 'masquerade' thinking that might cause the same effect, but
> obviously not.
>
> I'm going to search the internet for how to do this at cli level - I
> will post back.

Following up, some useful advice here:

http://docs.fedoraproject.org/en-US/Fedora/14/html/Deployment_Guide/s1-netwo...

and using the Network Administration Tool (system-config-network), I 
was able to redefine the eth0 configuration to avoid using a gateway 
entry.  Incidentally, this tool did not list wlan0, which surprised 
me, but the network manager applet in XFCE lets me set wlan0 the way I 
need it, so I was ok.

I restarted the machine completely.  Now I have:

$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref Use 
~Iface

192.168.13.0    *               255.255.255.0   U     2      0 0 wlan0
192.168.0.0     *               255.255.255.0   U     1      0 0 eth0
default         192.168.13.1    0.0.0.0         UG    0      0 0 wlan0

And the netbook acts as both an internet gateway, and a proxy server.

regards, Ron