> >>>>> I trying to setup multi-isp
configuration (using latest bering-uClibc
> >>>>> 3.1-beta1), and began reading the
corresponding doc:
> >>>>> http://www
.shorewall.net/3.0/MultiISP.html
> >>>>> I am not clear on how the DNS
resolution happens if a DNS request
> >>>>> from one provider goes to the
other provider's name server. ISPs
> >>>>> these days serve their customers
alone and reject all requests
> >>>>> outside their network.
> >>>>>
> >>>>> 1. As part of multi-isp setup, is
it possible to have the DNS requests
> >>>>> routed thru' a provider go to
provider's DNS IPs?
> >>>>>
> >>>>> 2. Does listing all ISP's DNS IPs
into /etc/resolve.conf help?
> >>>>>
> >>>>> Appreciate any pointers or links.
> >>>> DNS is not a special case -- it obeys
the same rules as any other
> >>>> connection.
> >>>>
> >>>> -Tom
> >>> Thanks for a prompt response Tom.
> >>>
> >>> DNS not being special case does make
sense. Do you have any suggestions
> >>> on how to deal with the DNS look up
failures when the requests are sent
> >>> to wrong provider.
> >> What does "request are sent to wrong
provider" mean?
> >>
> >> -Tom
> >
> > Let me give you an example:
> > isp1: DNS 1.2.3.4, 2.3.4.5
> > isp2: DNS 3.4.5.6, 4.5.6.7
> >
> > Assume that we list all the above in
/etc/resolv.conf file. When you
> > start the very first time, if using multi-isp, the
request for DNS
> > resolution could go to either of the two ISPs.
Assume that the request
> > goes to isp2 but the DNS server picked for
resolution is 1.2.3.4.
> > This scenario is what I am referring to as 'wrong
provider' (DNS
> > resolution point of view).
> >
>
> You might consider route_rules that route 1.2.3.4 and
2.3.4.5 out of
> isp1 and 3.4.5.6 and 4.5.6.7 out of isp2.....
>
> -Tom
Thanks for the tip. I have read the route_rules doc and
things are
a bit clear to me.
Thanks for all the help and wonderful package!
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