Bind and reverse lookup, something ain't right.

Sizam · 04-25-2005, 05:44 PM

So I'm running RH Fedora C1 and Bind 9.2.2 and have my domain setup and working fine, BUT I can only receive email, whenever I try to send it I get 'yahoo/google/whatever rejects your connection', so I remembered that this can be because my reverse lookup isn't setup correctly. I did a dig -x <ip> and true enough, instead of reporting mydomain.com it gave the my-sub.myprovider.com domain, what have I configured incorrectly?

from named.conf:

zone "<mybackwardsip>.in-addr.arpa" IN {
type master;
file "reverse.zone";
allow-update { none; };
};

from reverse.zone:

$TTL 86400
@ 1D IN SOA @ root (
42 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum

1D IN NS @
1 PTR mydomain.net.

Any help would be _much_ appreciated.

Thnx

scowles · 04-25-2005, 06:51 PM

You probably haven't configured anything wrong. With reverse lookups, your provider must delegate the SOA for your IP address to your DNS server. Good luck! Most ISP's won't delegate reverse SOA's to your DNS server, but some will make the change at their end to match the forward lookup. I know thats what I had to do with Verizon. i.e.

mail.mydomain.com = x.y.z.5 (forward queries answered from my DNS server)
x.y.z.5 = mail.mydomain.com (reverse queries answered from verizon's DNS servers)

At least they match

Also, I would suggest that you stop using your domain name @ for the SOA and NS records. These records need to be Fully Qualified Domain Names (FQDN). Example:

Code:

$TTL 86400
@ 1D IN SOA ns1.mydomain.net. root.mydomain.net. (
    42 ; serial (d. adams)
    3H ; refresh
    15M ; retry
    1W ; expiry
    1D ) ; minimum

@   1D IN NS  ns1.mydomain.net.
1   1D IN PTR mail.mydomain.net.