Powershell get ipv4 address into a variable

Question

Is there an easy way in powershell 3.0 Windows 7 to get the local computer\'s ipv4 address into a variable?

Answer 1

Here is another solution:

$env:HostIP = (
    Get-NetIPConfiguration |
    Where-Object {
        $_.IPv4DefaultGateway -ne $null -and
        $_.NetAdapter.Status -ne "Disconnected"
    }
).IPv4Address.IPAddress

Answer 2

If I use the machine name this works. But is kind of like a hack (because I am just picking the first value of ipv4 address that I get.)

$ipaddress=([System.Net.DNS]::GetHostAddresses('PasteMachineNameHere')|Where-Object {$_.AddressFamily -eq "InterNetwork"}   |  select-object IPAddressToString)[0].IPAddressToString

Note that you have to replace the value PasteMachineNameHere in the above expression

This works too

$localIpAddress=((ipconfig | findstr [0-9].\.)[0]).Split()[-1]

Answer 3

I recently had the same issue. So I wrote a script to parse it from the ipconfig /all output. This script is easily modifiable to obtain any of the parameters of the interfaces and it works on Windows 7 also.

1. Get output of IP config in LineNumber | Line format

$ip_config = $(ipconfig /all | % {$_ -split "rn"} | Select-String -Pattern ".*" | select LineNumber, Line)

2. Get list of interfaces (+ last line of ipconfig output) in LineNumber | Line format

$interfaces = $($ip_config | where {$_.Line -notmatch '^\s*$'} | where {$_.Line -notmatch '^\s'}) + $($ip_config | Select -last 1)

3. Filter through the interfaces list for the specific interface you want

$LAN = $($interfaces | where {$_.Line -match 'Wireless Network Connection:$'})

4. Get the start and end line numbers of chosen interface from output

$i = $interfaces.IndexOf($LAN)
$start = $LAN.LineNumber
$end = $interfaces[$i+1].LineNumber

5. Pick the lines from start..end

$LAN = $ip_config | where {$_.LineNumber -in ($start..$end)}

6. Get IP(v4) address field (returns null if no IPv4 address present)

$LAN_IP = @($LAN | where {$_ -match 'IPv4.+:\s(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})'})
$LAN_IP = &{If ($LAN_IP.Count -gt 0) {$Matches[1]} Else {$null}}

Answer 4

Another variant using $env environment variable to grab hostname:

Test-Connection -ComputerName $env:computername -count 1 | Select-Object IPV4Address

or if you just want the IP address returned without the property header

(Test-Connection -ComputerName $env:computername -count 1).IPV4Address.ipaddressTOstring

Answer 5

$a = ipconfig
$result = $a[8] -replace "IPv4 Address. . . . . . . . . . . :",""

Also check which index of ipconfig has the IPv4 Address

Answer 6

Here is what I ended up using

$ipaddress = $(ipconfig | where {$_ -match 'IPv4.+\s(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' } | out-null; $Matches[1])

which breaks down as

• execute ipconfig command - get all the network interface information
• use powershell's where filter with a regular expression
• regular expression finds the line with "IPv4" and a set of 4 blocks each with 1-3 digits separated by periods, i.e. a v4 IP address
• disregard the output by piping it to null
• finally get the first matched group as defined by the brackets in the regular expression.
• catch that output in $ipaddress for later use.