William Allen Simpson wrote:
That 84.40.24.22 inverse is only at 2 DNServers both located on the same subnet (very bad practice):
[snip]
I wouldn't worry so much about reverse DNS, since we are only using it for cosmetic purposes...
Also, I'm seeing incorrect DNS configuration (CNAME to CNAME): ;; ANSWER SECTION: en.wikipedia.org. 92 IN CNAME rr.wikimedia.org. rr.wikimedia.org. 600 IN CNAME rr.pmtpa.wikimedia.org.
CNAME chaining is not incorrect, just "discouraged". And yes, we are fully aware of the consequences of this setup.