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

[YoYo Siska <yoyo@gl.ksp.sk>]

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