Hello,
I am not sure if I have a reason to be uncomfortable but the results below do make me uncomfortable. Note that I do not have any problems accessing my network resources and the internet from any program. However...
Here is the ipconfig on my pc:
Connection-specific DNS Suffix . : mydomain.com
Description . . . . . . . . . . . : Intel(R) Centrino(R) Advanced-N 6230
Physical Address. . . . . . . . . : 88-53-2E-30-87-75
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : fcee:4:7:9:0:6:3ede:f16d(Preferred)
Lease Obtained. . . . . . . . . . : Saturday, February 02, 2013 1:32:46 PM
Lease Expires . . . . . . . . . . : Thursday, February 14, 2013 1:32:45 PM
Link-local IPv6 Address . . . . . : fe80::3039:a6e1:8fc:9bec%13(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.162(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Sunday, February 03, 2013 12:18:48 PM
Lease Expires . . . . . . . . . . : Sunday, February 03, 2013 1:18:47 PM
Default Gateway . . . . . . . . . : 192.168.0.17
DHCP Server . . . . . . . . . . . : 192.168.0.123
DHCPv6 IAID . . . . . . . . . . . : 327701294
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-4C-D3-C3-14-FE-B5-C1-FD-04
DNS Servers . . . . . . . . . . . : fcee:4:7:9:10::
fcee:4:7:9:11::
192.168.63.122
192.168.63.123
NetBIOS over Tcpip. . . . . . . . : Enabled
Connection-specific DNS Suffix Search List :
mydomain.com
And here is the reason for concern (ran on my pc):
C:\Windows\system32>nslookup www.yahoo.com
Server: UnKnown
Address: fcee:4:7:9:10::
*** UnKnown can't find www.yahoo.com: No response from server
But if I specify explicitly any of the DNS servers:
C:\Windows\system32>nslookup
www.yahoo.com white
Server: white.mydomain.com
Address: 192.168.63.122
Non-authoritative answer:
Name: ds-any-fp3-real.wa1.b.yahoo.com
Addresses: 2001:4998:f00b:1fe::3001
2001:4998:f00b:1fe::3000
2001:4998:f00d:1fe::3001
98.139.183.24
Aliases:
www.yahoo.com
fd-fp3.wg1.b.yahoo.com
ds-fp3.wg1.b.yahoo.com
ds-any-fp3-lfb.wa1.b.yahoo.com
Or
C:\Windows\system32>nslookup
www.yahoo.com skylark
Server: skylark.mydomain.com
Address: 192.168.63.123
Non-authoritative answer:
Name: ds-any-fp3-real.wa1.b.yahoo.com
Addresses: 2001:4998:f00b:1fe::3001
2001:4998:f00b:1fe::3000
98.139.183.24
Aliases:
www.yahoo.com
fd-fp3.wg1.b.yahoo.com
ds-fp3.wg1.b.yahoo.com
ds-any-fp3-lfb.wa1.b.yahoo.com
Ping works fine (as any other app out there that I tried):
C:\Windows\system32>ping www.yahoo.com
Pinging ds-any-fp3-real.wa1.b.yahoo.com [98.139.183.24] with 32 bytes of data:
Reply from 98.139.183.24: bytes=32 time=59ms TTL=47
Reply from 98.139.183.24: bytes=32 time=72ms TTL=49
Reply from 98.139.183.24: bytes=32 time=121ms TTL=47
Reply from 98.139.183.24: bytes=32 time=105ms TTL=49
Ping statistics for 98.139.183.24:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 59ms, Maximum = 121ms, Average = 89ms
More about the environment:
- Very small domain - two AD servers (both Windows Server 2012), two computers (running Windows 8) and three or four devices (printer, phone, WiFi access point, etc.).
- The network (DHCP, DNS, servers and gateway static addresses etc.) is both IPv4 and IPv6.
- There are DNS running on both DC servers.
- The servers have static IPv4 and 6 addresses.
- The servers have both DNS addresses (both IPv4 and 6) in their IP configuration.
- Single forward lookup zone - mydomain.com (and of course _msdcs...).
- Two reverse lookup zones one for IPv4 and one for IPv6.
- DHCP has the two DNS servers in the options.
Call me old-fashioned but I've been using "nslookup yahoo.com" to diagnose my network problems for years and now when it doesn't answer unless i specify the dns server, makes me nervous. Am I right and if I am can you suggest possible problems in
my configrations.
Thanks Val