DNS inaccessible

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Highlighted
New Contributor

Hi,

My server was working fine but it seems Microsoft pushed a security update made DNS crazy so I deleted all the configurations and built a new configurations from scratch but the new simple configuration doesn't work at all.. May you please guide me to the solution?

 

1. I can `ping` the server and `nslookup` it as ip from my PC without any problem:

https://i.imgur.com/AMz1uRb.png

 

2. When I try `nslookup` as domain from my PC I get `request timed out`

https://i.imgur.com/aE7Wn4R.png

 

3. I can `nslookup` from inside the server without any problem:

Screenshot_2020-09-17_11-23-55.png

 

4. `xxxxx.online` domain's nameserver configuration is:

Screenshot_2020-09-17_11-01-20.png

 ns1 & ns2 pointing to the same IP

 

5. My DNS configurations are:

Screenshot_2020-09-17_11-25-41.png

Screenshot_2020-09-17_11-26-04.png

 

6. The result of https://intodns.com/

Firefox_Screenshot_2020-09-17T08-58-17.193Z.png

 

NOTE:

* In all the configurations I use a single IP which is 89.xxx.xxx.50

* `ns1` and `ns2` point to the same domain xxxxxxx.online

* I use Windows Server 2012 R2

3 Replies
Highlighted

Please run;

  • Dcdiag /v /c /d /e /s:%computername% >c:\dcdiag.log
  • repadmin /showrepl >C:\repl.txt
  • ipconfig /all > C:\dc1.txt
  • ipconfig /all > C:\problemworkstation.txt


    then put unzipped text files up on OneDrive and share a link.

 

  •  

 

Highlighted

@mbnoimi 

Did you try to run wireshark or check whats going on in the wire.

are the packets reaching or for a reason the server is not responding.

try to run wireshark and see whats going on

Highlighted

@Dave Patrick  Both `Dcdiag` & `repadmin` are not exist!

 

C:\Users\Administrator>Dcdiag /v /c /d /e /s:%computername% >c:\dcdiag.log
'Dcdiag' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\Administrator>repadmin /showrepl >C:\repl.txt
'repadmin' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\Administrator>

Result of `ipconfig /all`

 


Windows IP Configuration

Host Name . . . . . . . . . . . . : HPC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Npcap Loopback Adapter:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Npcap Loopback Adapter
Physical Address. . . . . . . . . : 02-00-4A-4G-4G-90
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Autoconfiguration IPv4 Address. . : 169.254.179.62(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Embedded LOM 1 Port 3:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP Ethernet 1Gb 4-port 331i Adapter #3
Physical Address. . . . . . . . . : 3C-A5-2B-34-D9-17
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Embedded LOM 1 Port 1:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP Ethernet 1Gb 4-port 331i Adapter
Physical Address. . . . . . . . . : 3C-A5-2B-34-D9-15
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 89.19.XXX.50(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.248
IPv4 Address. . . . . . . . . . . : 89.19.XXX.51(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.248
IPv4 Address. . . . . . . . . . . : 89.19.XXX.52(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.248
IPv4 Address. . . . . . . . . . . : 89.19.XXX.53(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.248
IPv4 Address. . . . . . . . . . . : 89.19.XXX.54(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.248
Default Gateway . . . . . . . . . : 89.19.XXX.49
DNS Servers . . . . . . . . . . . : 127.0.0.1
89.19.XXX.50
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Embedded LOM 1 Port 4:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP Ethernet 1Gb 4-port 331i Adapter #4
Physical Address. . . . . . . . . : 3C-A5-2A-34-D9-18
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Embedded LOM 1 Port 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP Ethernet 1Gb 4-port 331i Adapter #2
Physical Address. . . . . . . . . : 3C-A5-2B-34-D9-16
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes