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Finding machines using a specific DNS server
Is there a way to find out what machines are using a specific DNS server? We are switching servers and want to make sure any static assigned machines are not using the old servers anymore.
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On the Microsoft site the recommended the WireShark Utility. See link below.
https://www.wireshark.org/
https://www.wireshark.org/
There's a few ways.
- enable logging on the DNS server. After a while, check the logs to see which machines have contacted it.
- run a network capture on the DNS server and filter on DNS traffic
- script something that will check the NIC settings on a list of client machines you provide
- enable logging on the DNS server. After a while, check the logs to see which machines have contacted it.
- run a network capture on the DNS server and filter on DNS traffic
- script something that will check the NIC settings on a list of client machines you provide
Ways you could do it:
1. Protocol analyzer (MS Network Monitor, WireShark, etc.)
2. DNS logging and review log files
3. Use a utility such as SpiceWorks, Zabbix, LanSweeper to identify network settings
4. Easiest way to do it would be to have a GPO which is a computer policy and it runs a powershell as per below:
get-dnsclientserveraddress
You could then run a DOS command on the all files to find a missing DNS server (i.e. 192.168.15.1)
type \\server\share\*.txt | find /i "192.168.15.1."
1. Protocol analyzer (MS Network Monitor, WireShark, etc.)
2. DNS logging and review log files
3. Use a utility such as SpiceWorks, Zabbix, LanSweeper to identify network settings
4. Easiest way to do it would be to have a GPO which is a computer policy and it runs a powershell as per below:
get-dnsclientserveraddress
You could then run a DOS command on the all files to find a missing DNS server (i.e. 192.168.15.1)
type \\server\share\*.txt | find /i "192.168.15.1."
Good point, I run Windows 10 and didn't even think of OS supported by different versions. What you could do is change the powershell command to "ipconfig /all > \\server\share\%computerna
You would have to manually check each text file as if you do a find for string DNS, it will always give you the primary server name. Secondary server name is in the next line.
You would have to manually check each text file as if you do a find for string DNS, it will always give you the primary server name. Secondary server name is in the next line.
The script in this article should help...
Make sure you create a TXT (c:\scripts\computers.txt)
The computers.txt file should look something like this...
The command should look something similar to this...
Good luck.
Make sure you create a TXT (c:\scripts\computers.txt)
The computers.txt file should look something like this...
computer1
computer2
computer3
The command should look something similar to this...
Get-Content C:\Scripts\computers.txt | C:\Scripts\Get-IPDetails.ps1 | ft -auto
Good luck.
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