Re: [gentoo-user] Override DHCP-provided DNS
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
[gentoo-user] Override DHCP-provided DNS
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 signature.asc Description: OpenPGP digital signature
Re: [gentoo-user] Override DHCP-provided DNS
On Wed, Jun 15, 2011 at 9:27 AM, YoYo Siska y...@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
Re: [gentoo-user] Override DHCP-provided DNS
Juan Diego Tascón wrote: On Wed, Jun 15, 2011 at 9:27 AM, YoYo Siskay...@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 Does this still work? config_eth0=( dhcp ) dhcp_eth0=nodns dns_servers_eth0=8.8.8.8 8.8.4.4 This worked before the openrc update but I guess it still does. Someone speak up if it doesn't. Hope that helps. Dale :-) :-)
Re: [gentoo-user] Override DHCP-provided DNS
Am 15.06.2011 20:53, schrieb Dale: Juan Diego Tascón wrote: On Wed, Jun 15, 2011 at 9:27 AM, YoYo Siskay...@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. [...] So to stop dhcpcd from touching your DNS or MTU settings you would do:- dhcpcd -C resolv.conf -C mtu eth0 [...] 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 [...] dhcp_eth0=nodns A, great. That's exactly what I was looking for. Wonder why I overlooked it. Probably because I searched the example file for DNS and dns. -.- Thanks for all the proposals! I guess I stick with the nodns option. The others aren't bad to know, either. Regards, Florian Philipp signature.asc Description: OpenPGP digital signature
