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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Just got on this thing (perhaps very belatedly) - root server trouble?
> There are > approximately 50,000 name servers that are authoritative for .com > (according to the .com zone file from the InterNIC). No. There are approximately 50,000 unique nameserver hostnames. At least 1/3rd of these, according to the survey I'm running right now, are completely bogus and simply don't exist. The survey that I'm running to study penetration of the eDNS roots gives a best guess of the ACTUAL .COM domains which are resolvable to be somewhere between 30% and 60% of the zones listed. We're about 10% of the way through the list right now (started early this morning) so what I have at this point has statistical significance. You hear that right folks. About 30% of the nameservers which supposedly are authoritative for .COM domains are either: 1) Non-existant (they don't resolve to an IP address) 2) Unreachable or 3) Don't know what "." is (!) Now, if it turns out that the number of so-called delegations which aren't really backed by authority records is also 30% of the listing, then that means that of the 790,000+ domains in the COM zone, only about 265,000 are "real", in that they have both a nameserver online AND a proper authority record on that nameserver. This is a direct result of NSI accepting applications for domains, and listing them, without checking for authoritative SOA records before issuing the records in the COM zone! I'm apalled at these numbers. In general, DNS is so broken and polluted right now that anyone who wants to take cheap shots at the eDNS system had better clean up their own yard first. The huge majority of eDNS registrars verify SOA and authority records before allowing the zone to issue. I know that we do here, and I was shocked at the number of bogus registrations that I had seen over the last few months. Now that I've actually studied the existing .COM zone, I'm no longer astonished. What blows me away is the apparent fact that this large of a percentage of the data out there is absolute trash, and nobody has cleaned up the yard. BTW, "entropy" doesn't explain this. 7 out of 8 registrations in COM are less than 18 months old according to NSI. -- -- Karl Denninger ([email protected])| MCSNet - The Finest Internet Connectivity http://www.mcs.net/~karl | T1's from $600 monthly to FULL DS-3 Service | 99 Analog numbers, 77 ISDN, Web servers $75/mo Voice: [+1 312 803-MCS1 x219]| Email to "[email protected]" WWW: http://www.mcs.net/ Fax: [+1 312 803-4929] | 2 FULL DS-3 Internet links; 400Mbps B/W Internal - - - - - - - - - - - - - - - - -
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