reverse dns does not work
Kevin Darcy
kcd at daimlerchrysler.com
Thu Aug 24 22:24:05 UTC 2000
bzhang at sohar.com wrote:
> When I did a nslookup, I got the same thing as you had: sohar.com.
>
> Our ISP is Concentric. The reverse dns has not been working for quite
> long time. Before it was another kind of error: if I used our dns
> server then dns lookup worked fine, but if I pointed it to an outside
> server, it no longer worked.
> I called several times. Each time they said they were going to
> delegate the reverse dns to us, but every time it turned out they did
> nothing. Until last Monday, a guy finally did it for me. Today when I
> came back, I found this strange thing. I thought I did something wrong
> on our end. Now it turns out it was their fault.
>
> What kind of evidence should I give to them to nail their fault?
Evidence? They can look at their own zone file! Ask them what pointing CNAMEs
from an in-addr.arpa zone to a name which doesn't resolve to a PTR is
supposed to accomplish...
- Kevin
> On 23 Aug 2000 16:04:50 -0700, Kevin Darcy <kcd at daimlerchrysler.com>
> wrote:
>
> >
> >I tried a few reverse lookups in that address range, and all I got were
> >CNAMEs to the name "sohar.com", which doesn't resolve to any PTR's.
> >I think your provider is somewhat confused about how to implement
> >RFC 2317. Given what you have set up on your server, they should be
> >pointing those CNAMEs to names in the 64/26.83.112.216.in-addr.arpa zone.
> >
> >
> >- Kevin
> >bzhang at sohar.com wrote:
> >
> >> I struggled with this for a long time. We got 64 IP addresses,
> >> 216.112.83.64-127, from our ISP. I am using version 8.1.* bind on Red
> >> Hat 6.2.
> >>
> >> Here is the named.conf
> >>
> >> options {
> >> directory "/var/named";
> >>
> >> };
> >>
> >> zone "sohar.com" {
> >> type master;
> >> file "db.sohar";
> >> };
> >>
> >> zone "meadep.com" {
> >> type master;
> >> file "db.meadep";
> >> };
> >>
> >> zone "64/26.83.112.216.in-addr.arpa" {
> >> type master;
> >> also-notify {
> >> 206.173.119.72;
> >> 207.155.183.72;
> >> 207.155.183.73;
> >> 207.155.184.72;
> >> };
> >> file "db.216.112.83.64-127";
> >> };
> >> zone "." {
> >> type hint;
> >> file "named.ca";
> >> };
> >> zone "0.0.127.in-addr.arpa" {
> >> type master;
> >> file "named.local";
> >> };
> >>
> >> Here is db.sohar
> >>
> >> $TTL 86400
> >> @ IN SOA dns.sohar.com. bzhang.sohar.com. (
> >> 2000081614 ; Serial (yyyymmddhh)
> >> 86400 ; Refresh (after 1 day)
> >> 900 ; Retry (after 15 minutes)
> >> 1209600 ; Expire (after 14 days)
> >> 345600 ; Minimum (TTL of 4 days)
> >> )
> >> IN NS dns.sohar.com.
> >> IN MX 10 mail.sohar.com.
> >> IN MX 20 custmail.concentric.net.
> >> IN A 216.112.83.112
> >> sohar58 IN A 216.112.83.112
> >> dns IN CNAME sohar58
> >> ..............
> >>
> >> Here is the file db.216.112.83.64-127
> >>
> >> $TTL 86400
> >> @ in soa dns.sohar.com. bzhang.sohar.com. (
> >> 2000071919 ; Serial (yyyymmddhh)
> >> 86400 ; Refresh (after 1 day)
> >> 900 ; Retry (after 15 minutes)
> >> 1209600 ; Expire (after 14 days)
> >> 259200 ; Minimum (TTL of 3 days)
> >> )
> >> in ns dns.sohar.com.
> >> in ns nameserver3.concentric.net.
> >> 112 ptr sohar58.sohar.com.
> >> .........
> >>
> >> Here is the db.meadep
> >>
> >> $TTL 86400
> >> @ IN SOA meadep.com. bzhang.sohar.com. (
> >> 2000081614 ; Serial (yyyymmddhh)
> >> 86400 ; Refresh (after 1 day)
> >> 900 ; Retry (after 15 minutes)
> >> 1209600 ; Expire (after 14 days)
> >> 345600 ; Minimum (TTL of 4 days)
> >> )
> >> IN NS dns.sohar.com.
> >> IN MX 10 mail.sohar.com.
> >> IN MX 20 custmail.concentric.net.
> >> IN A 216.112.83.112
> >> www IN A 216.112.83.111
> >
> >
> >
> >
> >
> >
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