On Tue, 25 Apr 2000 08:18:20 PDT, Bill Manning said:
The 2q2000 data for the in-addr tree shows 77402 unique
servers answering for 693,337 zones.
19515 servers blocked/refused data. Of the 57887 that
answered, these are the numbers for improper configuration:
So, of the 57,887 visable servers, 4314 are improperly configured
in the visable in-addr.arpa. tree. Thats 7.45% of the
servers being "not well maintained". I know of no similar data
Does "not well maintained" include the following:
1) DNS server for the zone is originally configured correctly, and the
first 20-30 hosts are entered with a proper A record and a PTR that matches.
2) Clueful guy leaves, new DNS "goo-roo" takes over, and adds the next 300
machines with just an A record, and no PTR matching. The checks you make
would show this as "well maintained", even though 90% of the hosts are broken
with respect to PTR entries.
Given that 7% of the sites can't get past step (1), I'm willing to bet that
a lot MORE of the sites are accumulating cruft under step (2).
Operating Systems Analyst