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mbnoimi's avatar
mbnoimi
Copper Contributor
Sep 17, 2020

DNS inaccessible

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:

 

 

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

 ns1 & ns2 pointing to the same IP

 

5. My DNS configurations are:

 

 

 

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

 

 

 

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

Networking

3 Replies

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  • farismalaeb's avatar
    farismalaeb
    Steel Contributor
    Sep 17, 2020

    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

  • Dave Patrick's avatar
    Dave Patrick
    MVP
    Sep 17, 2020

    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.

     

    •  

     

    • mbnoimi's avatar
      mbnoimi
      Copper Contributor
      Sep 19, 2020

      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

       

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