Quoting Steven M. Bellovin (17-May-01 13:04:32):
> In message <20010517102712.A6346@antioche.lip6.fr>, Manuel Bouyer
> writes:
>>On Wed, May 16, 2001 at 05:37:56PM -0400, Steven M. Bellovin wrote:
>>> In message <20010516231623.A590@antioche.eu.org>, Manuel Bouyer
>>> writes:
>>> >On Wed, May 16, 2001 at 06:19:02PM +0100, Georges Heinesch wrote:
>>> >> Hi.
>>> >>
>>> >> The usepeerdns option queries the remote peer during dialup if
>>> >> there are any DNS servers. Until now, I thought, that if the
>>> >> remote peer gives out the DNS servers, that those are used
>>> >> automatically.
>>> >>
>>> >> Tests revealed that this is apparantly not the case. The
>>> >> problem comes when using multiple providers.
>>> >>
>>> >> How can I tell pppd to use the DNS Servers which are negiciated
>>> >> during initial dialup (provided the peer gives out the DNS
>>> >> servers, which is not always the case)?
>>> >
>>> >Not easy;I don't think our pppd can get this info.
>>> >However; I use xisp as front-end to pppd, and it can
>>> >automatically add/remo
>>ve
>>> >entries from /etc/resolv.conf, based on the isp you're using.
>>>
>>> The man page (on 1.5.1beta1) says that it should automatically do
>>> the right thing, but it hasn't worked for me in my (very limited)
>>> tests:
>>>
>>> usepeerdns
>>> Ask the peer for up to 2 DNS server addresses. The
>>> addresses supplied by the peer (if any) are passed
>>> to the /etc/ppp/ip-up script in the environment
>>> variables DNS1 and DNS2. In addition, pppd will
>>> create an /etc/ppp/resolv.conf file containing one
>>> or two nameserver lines with the address(es) sup-
>>> plied by the peer.
>>
>>Did you try to write a ip-up script which prints to /dev/console
>>content if DNS1 and DNS2 ?
> I haven't, because until I cut-and-pasted that text yesterday I had
> misread the text to say that it was creating /etc/resolv.conf, not
> /etc/ ppp/resolv.conf. I'm dialed up right now (!@#$%^ cable modem
> provider), and I've confirmed that the latter file is indeed correct
> for what it would have received from the POP. I'll write something
> to put that data in a more useful spot -- but the answer seems to
> be that yes, it's doing the right thing. (This, btw, is 1.5.1b1.)
But still, even if pppd is doing what it says on the man pages, the
/etc/resolv.conf DNS servers are used despite the fact that pppd
queries the remote for its DNS servers and that this one spits them
out (and pppd stores them in /etc/ppp/resolv.conf). Still, the
/etc/resolv.conf DNS servers are used, not the /etc/ppp/resolv.conf
servers.
How can I _easily_ change that?
--
Cu Georges Heinesch, Luxembourg
geohei@geohei.lu
http://www.geohei.lu
PGP RSA & DH/DSS public key on request and on public servers
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