Weird DNS Issues
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So on a user's system when it is failing, what is an nslookup of the A and CNAMEs returning?
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@scottalanmiller said:
So on a user's system when it is failing, what is an nslookup of the A and CNAMEs returning?
What is the preferred syntax to check the A and CNAME with NSLOOKUP? Thanks....
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Even more simple than an NSLookup... what does IPconifg /all return on a computer that is having problems?
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@Dashrender said:
Even more simple than an NSLookup... what does IPconifg /all return on a computer that is having problems?
Even though DHCP is off on old and new DC/DNS server, it does contain info there...
One of the PC's that cannot resolve the name to the FILESERVER shows:
DHCP Server: Old DC
DNS Server: New DC
Primary WINS Server: Old PCOn my PC (Which is on Windows 8.1), doesn't return DHCP or WINS server info...and I've never had the DNS problem.
Keep in mind, this PC and resolve all other server and PC names EXCEPT the FILESERVER.
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@garak0410 said:
@Dashrender said:
Even more simple than an NSLookup... what does IPconifg /all return on a computer that is having problems?
Even though DHCP is off on old and new DC/DNS server, it does contain info there...
One of the PC's that cannot resolve the name to the FILESERVER shows:
DHCP Server: Old DC
DNS Server: New DC
Primary WINS Server: Old PCOn my PC (Which is on Windows 8.1), doesn't return DHCP or WINS server info...and I've never had the DNS problem.
Keep in mind, this PC and resolve all other server and PC names EXCEPT the FILESERVER.
Also, on a PC that is working and where I manually set the preferred DNS to the new DC and made the alternate the old DC, he also shows DHCP from the OLD DC.
I've really had no real solutions...just Band-Aids to get people up.
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@garak0410 said:
@scottalanmiller said:
So on a user's system when it is failing, what is an nslookup of the A and CNAMEs returning?
What is the preferred syntax to check the A and CNAME with NSLOOKUP? Thanks....
Just....
nslookup aname
nslookup CNAMEWhere aname and CNAME are the host names. There is no further syntax.
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Did I see that you have two DHCP servers running? There should be only one.
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@scottalanmiller said:
@garak0410 said:
@scottalanmiller said:
So on a user's system when it is failing, what is an nslookup of the A and CNAMEs returning?
What is the preferred syntax to check the A and CNAME with NSLOOKUP? Thanks....
Just....
nslookup aname
nslookup CNAMEWhere aname and CNAME are the host names. There is no further syntax.
On PC's that had no problem or had a problem, they either NSLOOKUP ANAME or CNAME to the old or new DNS server...and they all end with can't find cname: Non-existent domain (same with aname)
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I noticed on the new DC/DNS server, under the reverse lookup ZONE properties, under NAME SERVERS, the new DC/DNS server shows UNKNOWN...OK to update it?
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@garak0410 said:
@scottalanmiller said:
@garak0410 said:
@scottalanmiller said:
So on a user's system when it is failing, what is an nslookup of the A and CNAMEs returning?
What is the preferred syntax to check the A and CNAME with NSLOOKUP? Thanks....
Just....
nslookup aname
nslookup CNAMEWhere aname and CNAME are the host names. There is no further syntax.
On PC's that had no problem or had a problem, they either NSLOOKUP ANAME or CNAME to the old or new DNS server...and they all end with can't find cname: Non-existent domain (same with aname)
Sounds like you don't have your search domains defined and you are skipping the FQDN and are trying to use short names.
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I agree with Scott, you're using short name instead of FQDN (Fully Qualified Domain Names). It's something that started back in the NT days with NetBIOS. You really should replace all \servername\sharename with \severname.domainname.com\sharename
for your nslookup try 'nslookup olddc.domainname.com' or nslookup newdc.domainname.com
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Would you please post the exact output from ipconfig /all from a working and non working machine
should look like the follwing (you can change the same things I did if you want to hide your domain from us).
U:>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : om1290d2
Primary Dns Suffix . . . . . . . : domainname.net <- changed to protect
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : domainname.net <- changed to protectEthernet adapter Tripwire Tunnel Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Tripwire TAP Network Adapter
Physical Address. . . . . . . . . : 00-FF-CD-xx-xx-xx ** <- changed to protect**
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : YesEthernet adapter vEthernet (New Virtual Switch):
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter #2
Physical Address. . . . . . . . . : F0-92-1C-xx-xx-xx <- changed to protect
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::4d7d:7ce2:b72c:eb60%9(Preferred)
IPv4 Address. . . . . . . . . . . : 172.16.1.9(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 172.16.1.254
DHCPv6 IAID . . . . . . . . . . . : 183538204
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-7B-00-80-F0-92-1C-DD-55-A8DNS Servers . . . . . . . . . . . : 172.16.1.19
172.16.1.245
NetBIOS over Tcpip. . . . . . . . : EnabledTunnel adapter isatap.{F24F29C3-326D-xxxx-xxxx-xxxxxxxxxxxx}: <- changed to protect
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes -
This is from a PC that never lost it's naming to the FILESERVER:
Windows IP Configuration
Host Name . . . . . . . . . . . . : accounting01
Primary Dns Suffix . . . . . . . : domainname.local
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : domainname.localEthernet adapter Local Area Connection:
Connection-specific DNS Suffix . : pinnstr.local
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 00-30-67-xx-xx-xx
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d80:7b35:xx(Preferred)
IPv4 Address. . . . . . . . . . . : xx.xx.xx.xx(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, May 21, 2014 8:00:34 AM
Lease Expires . . . . . . . . . . : Thursday, May 29, 2014 8:00:01 AM
Default Gateway . . . . . . . . . : 10.xx.xx.xx (our firewall)
DHCP Server . . . . . . . . . . . : 10.xx.xx.xx (old DC/DNS server)
DHCPv6 IAID . . . . . . . . . . . : 234893415
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-8D-07-0C-00-30-67-61-63-9CDNS Servers . . . . . . . . . . . : 10.xx.xx.xx (new DC/DNS Server)
10.xx.xx.xx (old DC/DNS server)
Primary WINS Server . . . . . . . : 10.xx.xx.xx (old DC/DNS server)
NetBIOS over Tcpip. . . . . . . . : EnabledTunnel adapter isatap.domainname.local:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : domainname.local
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : YesFrom a PC I had problems with today (and still do):
Windows IP Configuration
Host Name . . . . . . . . . . . . : estimating02
Primary Dns Suffix . . . . . . . : domainname.local
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : domainname.localEthernet adapter Local Area Connection:
Connection-specific DNS Suffix . : domainname.local
Description . . . . . . . . . . . : Intel(R) 82566DM-2 Gigabit Network Connec
tion
Physical Address. . . . . . . . . : 00-1E-4F-xx-xx-xx
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::3156:295c:xx(Preferred)
IPv4 Address. . . . . . . . . . . : 10.xx.xx.xx(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Tuesday, May 13, 2014 3:14:11 PM
Lease Expires . . . . . . . . . . : Thursday, May 29, 2014 9:55:01 AM
Default Gateway . . . . . . . . . : 10.xx.xx.xx (firewall)
DHCP Server . . . . . . . . . . . : 10.0.0.16 (old DC/DNS server)
DHCPv6 IAID . . . . . . . . . . . : 234888783
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-61-xx-xx-xx-xx-xx-xx-xx-xxDNS Servers . . . . . . . . . . . : 10.xx.xx.xx(new DC/DNS server)
Primary WINS Server . . . . . . . : 10.xx.xx.xx (old DC/DNS server)
NetBIOS over Tcpip. . . . . . . . : EnabledTunnel adapter isatap.domainname.local:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : domainname.local
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes -
See the search name in the working one? That is missing in the not working one I think.
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@scottalanmiller said:
See the search name in the working one? That is missing in the not working one I think.
I see it in both.
Is there any clue as to why this is ONLY name resolution problems to the fileserver and nothing else?
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Can't think of anything. If every setting is the same.
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@garak0410 said:
Is there any clue as to why this is ONLY name resolution problems to the fileserver and nothing else?
Host files, LMHOST files If the other servers are answering to NetBIOS over IP calls where the new file server won't.
My biggest guess is the last one.. Windows 2012 server might not be resolving NetBIOS names any more...
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Assuming you didn't install WINS on your new AD server you should remove the WINS information from all clients and from the DHCP server so it's not handing out that information.
This will also cause issues in some cases. -
Oh good point. Don't want old WINS mucking about.
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This post is deleted!
