Re: [gentoo-user] Override DHCP-provided DNS

["Juan Diego Tascón" <juantascon@gmail.com>]

On Wed, Jun 15, 2011 at 9:27 AM, YoYo Siska <yoyo@gl.ksp.sk> wrote:
> On Wed, Jun 15, 2011 at 04:07:43PM +0200, Florian Philipp wrote:
>> Hello list!
>>
>> for some wireless access points, I want to get an IP via DHCP but not
>> use the provided DNS-server (I use an openvpn setup with its own DNS
>> server, domain name, etc.).
>>
>> In /usr/share/doc/openrc-0.8.2-r1/net.example it reads:
>> # Setting name/domain server causes /etc/resolv.conf to be overwritten
>> # Note that if DHCP is used, and you want this to take precedence then
>> # please put -R in your dhcpcd options
>>
>> But dhcpcd does not seem to have a -R option. It does have a --static
>> option, though. While this is good enough for simply setting the DNS
>> server, it does not seem to allow specifying domain names or
>> search-domains (at least it is not shown in the man-page).
>>
>> Please tell me what the proper way is and whether the mention of "-R" is
>> a documentation bug.
>>
>> Thanks in advance,
>> Florian Philipp
>
> from the man page, this seems to do  what you want
> (never tried, i use dhclient and its /etc/dhcp/dhclient.conf):
>
>     -C, --nohook script
>             Don't run this hook script.  Matches full name, or prefixed with 2 numbers optionally ending with .sh.
>
>             So to stop dhcpcd from touching your DNS or MTU settings you would do:-
>                   dhcpcd -C resolv.conf -C mtu eth0
>
>
>  yoyo
>
>

I use the google dns servers so I created a /etc/resolv.conf file and
set the i attribute on it:

chattr +i /etc/resolv.conf

that way it can't be removed or overwritten and you won't have that
problem no matter what dhcp client you are using