[GLLUG] [WLUG] DHCP question

[Richard Houser]

Tom,

I think pretty much everyone just forwards to their ISP's DNS server when
they want that behavior.  Have you checked to see if your dhcp client allows
you to run a script at each renew?  If so, you can probably just re-hup your
DNS server or something to pull in the change.

On Sun, Nov 23, 2008 at 8:56 PM, Karl Schuttler <karl.schuttler at gmail.com>wrote:

> You could always just cache DNS locally, or keep around some other DNS
> servers IP addresses commented for when times are rough (opendns.org
> for instance).
>
> On Sun, Nov 23, 2008 at 6:41 PM, Tom Allison <tom at tacocat.net> wrote:
> > This might sound dense, but I've a DNS/DHCP question that I'm just not
> sure
> > what the answer is.
> >
> > My firewall has a DHCP client connection to my ISP that gives me their
> > subnet and their DNS servers.
> >
> > This same box gives me the DHCP server and DNS information for my subnet.
> >  The DNS server uses forwarding to hit the ISP DNS server for lookups.
> >
> > I was burned once by the ISP changing their DNS server IP and Names. The
> DNS
> > configuration isn't built out from the DHCP connection, it's hard coded
> in
> > my dns configuration files.
> >
> > Is there some reasonable way to keep these two in sync?
> > Otherwise, is there some approach to semi-automate the identification and
> > correction?  I suppose I could always write a perl script to do this.
>  But I
> > can't imagine I'm the only one in the world to want to do this.
> > --
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