help with classless network and reverse lookups

[Bill Dossett]

Thanks for the response... I'm a little unclear
about having the two zones...  probably becuase
I didn't clearly state that I don't own the network
addresses above my range of IP numbers, my ISP
does... so they need to configure the CNAME
portion, right?  And the reverse zone file I have
listed below is all I need for reverse name lookups
right?  As I only have 64 addresses... that's why I named
the file 193.243.235 rather than 193.243.235.0-26
because I won't have a 193.243.235.in-addr.arpa ...
my ISP does.  So I just named it 193.243.235 as it's
quicker to type in and I know I only have 64 addresses
and it won't conflict with any other files unless I get
a whole class C which I more than likely never will
as there are only 3 of us in the company .... In any
case, I contacted my ISP this morning, they did something,
and now it works, so I guess my files were right as
it's working now.

I didn't understand the last part of this response...
That I should "slave"  off of this zone... I'm not
really too up on slaving, I presume if I slave, I cache
the data from that zone and then I will still get reverse
name lookups to work localy if I become disconnected
for any reason... any chance someone could
show me what the entry in my named.conf would look like?
and then I'll go away :-)

Thanks

Bill

Mark.Andrews at nominum.com wrote:

> >
> > Hi,
> >
> > I've been through the archive and I'm a little confused
> > about classless subnetting and reverse name lookups.
> > I believe I have my configuration setup correctly, but
> > from what I have read in the archives, it seems to say
> > that this should work for my internal network even if
> > my ISP has not set their reverse zones up as per RFC2317...
> > So, I am unclear if I have a problem in my configuration or
> > if my ISP is not setup correctly and my server is referencing
> > their servers and it isn't working because of that.  The
> > relevent bits are...
> >
> > named.conf contains
> >
> > zone "0-26.235.243.193.in-addr.arpa"{
> >         type master;
> >         file "193.243.235";
> > };
>
>         I would call the file "193.243.235.0-26", you will want
>         "193.243.235" for the 235.243.193.in-addr.arpa zone.
>
> >
> > 193.243.235 contains
> >
> > $ORIGIN 0-26.235.243.193.in-addr.arpa.
> > @    IN SOA     ns0.terrapin.co.uk.     postmaster.bill.co.uk. (....)
> > ...
> > @                       NS      ns0.terrapin.co.uk.
> > @                       NS      ns0.emtex.com.
> > 3                       IN      PTR     lucida.terrapin.co.uk.
>
>         looks reasonable, however you should post the whole master
>         file.
>
> >
> > which I think is correct yet I can't get any reverse info,
> > in fact when I start nslookup pointed at 193.243.235.3,
> > it fails saying it can't find the name of the server.
>
>         Use dig, nslookup is querky.
>
> >  When
> > I explicity point it at 193.243.235.3 again and do a host.domain
> > lookup, it responds fine.... So, is the problem with my ISP
> > or am I guilty of a typo somewhere (that I haven't been
> > able to see for 10 hours????)
> > The only other info I have at the moment is my My log files are telling
> > me that
> >
> > named[4278]: Lame server on '3.235.243.193.in-addr.arpa' (in
> > '235.243.193.in-addr.arpa'?): [193.243.233.9].53 'ns1.cerbernet.co.uk'
> >
> > ns1.cerbernet.co.uk is my ISPs name server....
>
>         Well you are not going to succeed until the parent zone is setup.
>         You should also be a slave of this zone as you will need it when
>         you are disconnected from the net.
>
>         Mark
> >
> > and then I get a
> >
> > named[4278]: ns_forw: query(10.235.243.193.in-addr.arpa) All possible A
> > RR's lame
> >
> > and I haven't been able to figure out exactly what these
> > are trying to tell me.
> >
> > I'd sure appreciate if someone could clear this up for me as
> > I can't seem to make any further headway.
> >
> >
> > Thanks,
> >
> > Bill
> >
> >
> --
> Mark Andrews, Nominum Inc.
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com