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We're setting up a software firewall, and one of the issues we're facing is that eth0 has a dynamic IP address.

In /etc/network/interfaces we've got the following:

# The loopback network interface
auto lo
iface lo inet loopback

# internet-facing interface
auto eth0
iface eth0 inet dhcp
    dns-nameservers 192.168.5.8 192.168.5.5
    dns-search -------.local

# The primary network interface
auto eth1
iface eth1 inet static
    address 192.168.5.252
    netmask 255.255.255.0
    network 192.168.5.0
    broadcast 192.168.5.255
    dns-nameservers 192.168.5.8 192.168.5.5
    dns-search -------.local

# This is an autoconfigured IPv6 interface
iface eth1 inet6 auto

The problem is that resolv.conf ends up with the DNS IP's of our ISP...

Update As stated above, resolv.conf gets the DNS IP addresses of our ISP that are part of the DHCP Package. The idea is that we get just an IP address, but basically only use our internal DNS servers. So the DNS parameters of DHCP should be ignored. Any ideas how to accomplish this?

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    So, what is your problem ? cannot understand
    – krisFR
    Commented Mar 20, 2014 at 23:22
  • He wants to use his own DNS servers instead of the ISP dhcp discovered ones and the DNS servers in the eth0 network stub are being overridden.
    – squareborg
    Commented Mar 20, 2014 at 23:28
  • @Shutupsquare Sorry, i don't have my crystal ball under hands ;)
    – krisFR
    Commented Mar 20, 2014 at 23:33
  • @user2196728 The first time I read it I didn't get the problem till I read the config.
    – squareborg
    Commented Mar 20, 2014 at 23:35
  • @Shutupsquare Ok great ! BTW i am glad to see that i was not the only one thinking that it was unclear ! Feel free to reword the question to make it more clear and stop the "on hold" status
    – krisFR
    Commented Mar 20, 2014 at 23:40

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