windows get IP dynamically - windows

Question

i want to implement the following logic. Does it possible to have such implementation using batch or power shell ? please share with me script for that.
Let say I have a configuration file with the following "config.propertis":
BOOTPRORO=statis or dhcp
IPADDR=192.168.10.10
NETMASK=255.255.255.0
GATEWAY=192.168.10.1
DNS=8.8.8.8
I want that at startup the system will check that file and configure network accordingly:
OS: Windows
if in BOOTPROTO=dhcp, when use DHCP in network configuration and ignore all another in config file, except DNS
if in BOOTPROTO=static, then use all variables from config file to configure IP as static.
So, I have such logic under the Linus, using shell. The script in configured in rc.d and execute before network service. Does it possible to implement such over the Windows ? Guys, please share the script !

Answer 1

We can definitely do this.
First things first, because a lot of systems have more than one network interface, you'll need to determine what the ifIndex is of the adapter that we want to change. Do that by running Get-NetIPInterface. You should see results like this:
In my example and going forward, I'll be using this index, 41. You should change this to match what you find on your own computer.
OK, now to read from the text file. Since you've provided the data in a key=value pair format, commonly called a hashtable, we can easily grab the data from there using ConvertFrom-Stringdata. This will give us a PowerShell hashtable, and we can pull the needed line out like this.
$values = get-content T:\config.properties | ConvertFrom-StringData
$values.BootProro
>statis
We can us this to set the PC in Dynamic IP mode, or to set static addresses. Now, for you to use this in your environment, you need to find the ifIndex, as I mentioned before. replace my index of 41 with your own, and then give it a shot. I've added -WhatIf to every line, so you will see what would happen when you run it. If you're happy with the changes it woudl make, remove -Whatif to make the script actually change the settings.
$values = gc T:\config.properties | ConvertFrom-StringData
if ($values.BOOTPRORO -eq "dhcp"){
Write-Output "---DHCP mode detected in 'config.properties' file"
Write-Output "---Setting Set-NetAdapter -DHCP Enabled"
Set-NetIPInterface –InterfaceIndex 41 –Dhcp Enabled -WhatIf
}
else{
Write-outPut "---static mode detected in 'config.properties' file"
Write-Output "---Removing network configuration"
Remove-NetIPAddress -InterfaceIndex 41 -whatif
Write-Output "---Setting new network configuration equal to"
$values
New-NetIPAddress -DefaultGateway $values.GATEWAY -IPAddress $values.IPADDR -PrefixLength 24 -InterfaceIndex 41 -WhatIf
Set-DnsClientServerAddress -ServerAddresses $values.DNS -InterfaceIndex 41 -WhatIf
}
The output looks like this:

Answer 2

in Windows we can set ip address via batch file or powershell script but when you use dhcp address your ip is Dynamic not static I Imposition you want static ip address
BAtch-file
netsh interface ip set address name=”Local Area Connection” static 192.168.10.10 255.255.255.0 192.168.10.1
netsh interface ip set dns name=”Local Area Connection” static 8.8.8.8
if you want be dhcp You should set
netsh interface ip set address name=”Local Area Connection” source=dhcp
note I Imposition you nic name is Local Area Connection
In powershell V3.0 and Later we Used
New-NetIPAddress –InterfaceAlias “Local Area Connection ” –IPv4Address “192.168.10.10” –PrefixLength 24 -DefaultGateway 192.168.10.1
Set-DnsClientServerAddress -InterfaceAlias “Local Area Connection” -ServerAddresses 8.8.8.8
and for startup you can put script .bat and .ps1 in startup windows but attention you should Set-ExecutionPolicy bypass before U run any script of powershell
for startup any script see link