On 10/31/2009 10:36 AM, Ansgar Wiechers wrote:
There's also nothing wrong with a setup like this:
192.0.2.1 PTR uranus.example.com.
192.0.2.1 PTR www.example.com.
192.0.2.1 PTR ftp.example.com.
192.0.2.1 PTR blog.example.com.
192.0.2.1 PTR wiki.example.com.
uranus.example.com. A 192.0.2.1
www.example.com. A 192.0.2.1
ftp.example.com. A 192.0.2.1
blog.example.com. A 192.0.2.1
wiki.example.com. A 192.0.2.1
Except that b0rken software may choke on it. Duh.
... and DNS returns a pseudo-random response, so you can't
control which PTR gets returned first.
... and software that cares about the PTR and doesn't choke
won't ever look past the first pseudo-random response.
So you really don't gain anything other than getting to show
off how you can cram lots of unnecessary stuff into your DNS
record. Sometimes this makes the neubs feel better, but it
really doesn't bring any benefit.
-- Noel Jones
