Re: getting static dns

GROG! (Jeff Howie) wrote:
> On Wed, Aug 23, 2006 at 06:00:14AM -0700, Yan Seiner wrote:
>   
>> GROG! (Jeff Howie) wrote:
>>
>> udhcpc = micro dhcp client :-)
>>     
>
> :^>
>
>   
>> you need to add your DNS server to /etc/resolv.conf.
>>
>> Be careful though - I haven't been through the config scripts for the
>> zaurus; on many machines that are typically networked
>> /etc/resolv.conf is dynamically generated at boot time or at lease
>> renew time.
>>
>> I don't know if OZ does this.
>>
>> For the layout of the file, man resolv.conf or google for 'manpage
>> resolv.conf'
>>     
>
> If I understand correctly then if I want to request a static ip I have
> to then statically specify my dns servers too? Makes sense in a
> unix-ish kinda way :?) (makes me wonder how I ever managed to get past
> this before).
>
>   
Yup... I wish there was a 'partial dhcp' implementation - something 
where I could say, "hey, give me the current gateway and dns servers".  
I have a few computers that travel, their IPs don't change but the 
gateway and dns info do....

It's a pita....  I deal with it via icmp redirects, but it would be nice 
to request fresh info at boot time.

> I've checked out the /etc/resolv.conf file, and it's a symlink to
> /var/run/resolv.conf. Currently it contains:
>
>     $ cat /var/run/resolv.conf
>     search mydomain.org
>     nameserver ip_of_my_router
>
> So that must be from the last time I ran udhcpc. On a clean reboot
> before trying to start any net connections, the symlink in /etc
> exists, but the /var/run file it points to doesn't. This is probably
> set up by /etc/default/volatiles/01_resolv.conf, right? (hey, he's not
> so dumb after all, ...).
>
> So after checking the resolv.conf man page, I first moved the
> volatiles file out of the way, removed the /etc symlink & added
> 'nameserver ip_of_my_router' into a real file under /etc. After I
> rebooted, sure enough my resolv.conf was still in place. kewl.
>
> I'll have to wait 'til I get home to test, but you'll be sure to hear
> back if there's any problems :?). I also understand that resolv.conf
> will get overwritten if I connect to another network using dhcp. I'll
> deal with it. If it becomes too much of a problem maybe I'll just
> switch over to using dhcp @ home as well. That way it all of this
> won't be an issue at all! A good learing experience if notbing else.
>
> Thanks muchly for the help.
>
>   
I think you about got it...

--Yan


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