All servers in this are Server 2008 R2.
I’ve been searching all day for the answer to this one, but I’ve not seen something like this before. I have setup two AD servers with DNS on each (10.6.0.30, 10.6.0.31). The systems themselves have their DNS set to their local DNS servers and the DNS server is forwarding OpenDNS (208.67.222.222, 208.67.220.220). We purchased another company and with it came their own AD. I setup a secondary zone on our DNS servers for their old DNS until we are ready to migrate everyone over to our primary AD domain.
I found that when I ping and run an nslookup against our local DNS servers (doesn’t matter if it’s out primary server or even the old one from the company we purchased) the results are different than when I run the same tests against OpenDNS and Google’s DNS.
For example:
With our local DNS servers
> financialfreedomadvisors.com
Server: UnKnown
Address: 10.6.0.30
Non-authoritative answer:
financialfreedomadvisors.com nameserver = expired2.domainsupport.net
financialfreedomadvisors.com nameserver = expired1.domainsupport.net
expired2.domainsupport.net internet address = 216.104.163.6
expired1.domainsupport.net internet address = 216.104.162.6
And with OpenDNS
> server 208.67.222.222
Default Server: resolver1.opendns.com
Address: 208.67.222.222
> financialfreedomadvisors.com
Server: resolver1.opendns.com
Address: 208.67.222.222
Non-authoritative answer:
financialfreedomadvisors.com
primary name server = ns.rackspace.com
responsible mail addr = hostmaster.rackspace.com
serial = 1350799618
refresh = 3600 (1 hour)
retry = 300 (5 mins)
expire = 1814400 (21 days)
default TTL = 300 (5 mins)
financialfreedomadvisors.com MX preference = 10, mail exchanger = MX1.EMAILSR
VR.com
financialfreedomadvisors.com MX preference = 20, mail exchanger = MX2.EMAILSR
VR.com
financialfreedomadvisors.com nameserver = ns2.rackspace.com
financialfreedomadvisors.com nameserver = ns.rackspace.com
financialfreedomadvisors.com internet address = 184.106.13.82
I just don’t see any reason why this would happen. I have a set of AD/DNS servers setup in the same manner in another of our offices (different domain) and the test results between both OpenDNS and those DNS server match, i.e. they are correct unlike this results I’ve show above.
I have searched all day, but I haven't found anyone who has described this exactly. There are no host file entries and there are no records which correspond to this. Most nslookups and pings resolve correctly, it's just a few of our domains which do not.