[ubuntu-uk] DNS - request for info/advice

[Mac]

Sean Miller wrote:
> On Wed, Jul 9, 2008 at 12:08 PM, Mac
> <Ammonius.Grammaticus at googlemail.com> wrote:
>> Modwen Road
>> Salford M5 3EZ
>> United Kingdom
>>
>> You see:  Salford.  You've got to worry, haven't you?!  ;-)
> 
> I'd be more worried if it was Bucharest...
> 
>> I guess that NetworkManager will have picked up the DNS IP from the
>> router, and written it to /etc/resolv.conf?
> 
> Sounds slightly odd to me... I'd normally expect the router's IP to be
> there alone with DHCP... who's your ISP, btw?  Could it be they use
> Netservices?

I use Fasthosts as my ISP;  they have their own DNS, and don't use 
Netservices (I rang to check).

I've been digging about a bit, and it looks like the Netservices' DNS is 
used by various firms.  (I'm wondering whether I didn't latch on to it 
somewhere as a DNS that provided an anonymous service.  Does that ring 
any bells with anyone?)

As for the contents of /etc/resolv.conf, it gets modified if you go to 
System>Administration>Network>DNS, and 'add' DNS IPs there.  That's 
where the Netservices IPs were listed as the DNSs, and where I replaced 
it with the Fasthosts DNS IPs (primary and secondary).

But I found that all the computers on the LAN had the same 
/etc/resolv.conf - and I've variously got Gutsy, Hardy, and Debian Etch 
  installed on desktops and laptops.  I didn't set the networks up 
manually, so I can only think that the settings in /etc/resolv.conf must 
be read from the router DNS IP settings during installation.  (The 
common denominator is, of course, NetworkManager.  Presumably that's 
what's picking up the settings?)

Mac