Reverse lookup of selected IP addresses without delegation agreement?

[Ralph Seichter]

Len Conrad wrote:

 > named will bitch about "out of zone data"

What a nitpicking piece of software. :-)

 > it could [cause trouble], if your spoofing doesn't match official PTR
 > over at the delegated DNS.

Looks like I chose an interesting example. Here's the official data:

   $ dig mail.sourceforge.net
   mail.sourceforge.net. 3985 IN A 66.35.250.206

   $ dig -x 66.35.250.206
   206.250.35.66.in-addr.arpa. 3600 IN CNAME 
206.0/24.250.35.66.in-addr.arpa.
   206.0/24.250.35.66.in-addr.arpa. 683 IN PTR lists.sourceforge.net.

When I use my own configuration, I get this result instead:

   $ dig -x 66.35.250.206
   206.250.35.66.in-addr.arpa. 86400 IN PTR mail.sourceforge.net.

Do I understand correctly that you're suggesting to have my own server
return lists.sourceforge.net instead of mail.sourceforge.net? Is that
what you mean by "match official PTR"?

Ralph