Charles Curley wrote:
I have a firewall, on which I just installed a text mode only ubuntu
7.04. I have two problems related to DHCP. Both interfaces use DHCP.
* Each time a lease renews, dhclient sets /etc/resolv.conf to the
server information in that lease's information. I would like to
ignore the information for the external interface, and only use that
from the internal. I think I have a partial workaround with the
prepend domain-name-servers and supersede domain-name statements,
but that leaves me either with two entries for each local server, or
the local servers and the ISP's servers.
* When the firewall boots, dhclient uses both routers to configure the
routing table. This means I get two default gateways, with the wrong
route first. How do I tell dhclient to ignore the internal
interface's gateway (which will be the firewall's internal
interface)?
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To start with, I have to ask the question of why you are running dhcp on
your internal network interface? I can understand wanting to run the
DHCP server on a different box but it is usually best to have the
firewall use a static address internally. Anyways, I have some thoughts
on how to do this.
dhcpcd has command line options to have it skip writing resolv.conf file
(the -R option) and from specifying a gateway (the -G option). But I am
guessing that you are using dhclient since it is Ubuntu. In this case,
you will probably want to edit the dhclient.conf file. With it, you can
specify to override (or supersede) options returned by the dhcp server.
You will have to do a bit of playing with it but it should be able to
override specific options for certain interfaces. Look in the man page
for dhclient.conf.
Good Luck
Mike
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