Set DNS Servers For All Wifi Networks

[Colin Law]

On 11 September 2014 15:44, Tom H <tomh0665 at gmail.com> wrote:
> On Thu, Sep 11, 2014 at 8:24 AM, Colin Law <clanlaw at gmail.com> wrote:
>> On 11 September 2014 10:24, Patrick Asselman <iceblink at seti.nl> wrote:
>>>
>>> Using your own DNS server list can prevent you becoming victim of DNS
>>> spoofing attacks.
>>> It is definately a good idea to use your own DNS server list on a public
>>> wifi spot.
>>> (But it is not sufficient to really be safe!)
>>>
>>> http://www.cs.wustl.edu/~jain/cse571-07/ftp/cafecrack/#Section4
>>
>> Thanks for that Patrick.  It seems like a useful addition to NM would
>> be able to specify DNS globally, or possibly better have a default
>> setting so that new connections would use that DNS unless explicitly
>> told otherwise.
>
> You can set nameservers in the NM gui applet or by editing the
> connection in "/etc/NetworkManager/system-connections/" with, for
> example, "dns=8.8.8.8;8.8.4.4;" in the "[ipv4]" section.

We know that you can do it on a connection by connection basis, the
whole point of this thread is how to specify it globally so that when
you connect to a new wifi network in a hotel or whatever that there is
no need to manually set up DNS for the new connection.  My point was
that this would be a useful extension to Network Manager.  In fact it
could almost be considered a security bug since allowing the use of
unknown DN Servers leaves one open to spoofing.

Colin