Re: DNS forwarders

On Sat, 2008-02-23 at 19:36 -0800, Howard Chu wrote:
> I run a caching named on my laptop, so I've configured my dhclient to write 
> any received DNS server addresses into an /etc/named/forwarders.conf file 
> instead of /etc/resolv.conf. However, NetworkManager still overwrites my 
> resolv.conf with the remote DNS server addresses, even though I've changed my 
> /etc/sysconfig/network options and told it not to update resolv.conf any more.
> (I think I already restarted NetworkManager too, so it ought to have read the 
> new config.)

NetworkManager takes over /etc/resolv.conf while it's running, and
there's an interface to send forwarders to a D-Bus service run by named
that will act as a caching nameserver.  If you're running F8 though,
that may have been removed from your named packages already, as it's
somewhat in flux upstream.

> It seems to me that updating resolv.conf is always the wrong thing to do 
> anyway; my computer's FQDN is what it is, no matter what network I connect to. 
> Why should my resolv.conf's domain and search list change just because I've 
> moved to a different physical location?

NM may get DNS information from multiple sources, including VPN,
mulitple devices, etc.  If you're running in a caching nameserver
situation with a D-Bus enabled caching nameserver that can talk to NM,
you'll only ever see "" in /etc/resolv.conf.


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