D'oh!

[chris-n/jUll39koHNgV/OU4+dkA at public.gmane.org]

Lennart Sorensen writes: 

> On Sat, Jan 19, 2008 at 11:11:41AM -0500, Christopher Aitken wrote:
>> Internet (cable modem) --- router --- all other machines 
>> 
>> The reason I keep harping on the little gui network configurator 
>> ('neat') is not because I'm looking for pity and want a nice little gui 
>> network configurator to use in ubuntu (okay I /would/ like such an app 
>> (but not the pity)). I'm just trying to let you guys know that what I 
>> was doing on previous installations (successfully for years) was simply 
>> this: 
>> 
>> 
>>                                             "ppc" (192.168.0.3 for 
>> local stuff like scp and printing; dhcp-asigned address for Internet)
>>                                              -
>>                                              -
>>                                              -    
>> internet (cable modem) --- router --- "cpc" (192.168.0.2 for local stuff 
>> like scp and printing; dhcp-asigned address for Internet)
>>                                              -
>>                                              -
>>                                              -
>>                                             "dpc" (192.168.0.4 for 
>> local stuff like scp and printing; dhcp-asigned address for Internet) 
>> 
>> 
>> I'll use "ppc" as an example since it is the last fedora box (with the 
>> 'neat' app) in the house. In 'neat' I simply click on the Ethernet 
>> Device eth0 and click 'Add' to add a new "Ethernet Device" which is then 
>> named eth0:1. To that device I assign "Static Address"  192.168.0.3/24. 
>> The eth0 Device is set to "Automatically obtain IP address settings via 
>> DHCP". 
>> 
>> I do not understand IP anywhere near as well as you. I do, however, 
>> humbly insist that the above works (for me) very well. I simply have not 
>> been able to do this on the ubuntu machine. 
>> 
>> Hopefully this text diagram will not be a mess when I email it.
> 
> I think the real problem is that you keep trying to add a new interface
> when you only have one and just should be changing its settings. 
> 
> Change eth0 from DHCP to Manual and set the IP you want. 

But don't I have to have a "Device" set to 'Automatically obtain IP address 
from DHCP'? Isn't that how I say "yes" to the Internet cable modem (via my 
router?) that I do want an IP address on the Internet? 

> That's all you
> need.  Each machine only has one interface, which is then eth0 in most
> cases, so that is the only interface that should have any configuration
> at all, 

But doesn't the "one interface" need two addresses (one DHCP-assigned for 
Internet and one static for printing/scp et al.)? 

> and if you want fixed addresses, don't use DHCP since DHCP is
> for dynamically assigned addresses.

Yes, "dynamically assigned" by the ISP, no? 

> Just make sure you set the IP, DNS server and gateway IP correctly. 

Oh yeah! My static address lets me scp/print et al. and when I want the 
Internet the gateway (192.168.0.1) gets me there! 

Chris 

> The
> DNS and gateway are probably your router's local IP, although the DNS
> could be something else.  You can check your current settings
> (/etc/resolv.conf should show the current nameserver) and 'ip ro sh' or
> 'route' should show your current default gateway IP (which will be the
> router's internal IP for sure). 
> 
> --
> Len Sorensen
> --
> The Toronto Linux Users Group.      Meetings: http://gtalug.org/
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--
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