CODEWITHSUNDEEP
powershellip
Leron
Leron

Reputation: 9856

How to get only IPv4 address(es) for a hostname

I am making writing a Powershell script that have to automize the initial set-up of a windows machine. For some of the operations I'm gonna need the machine IP but since we are part of a large group (not sure about the terminology) and there's a chance that at some point the same hostname may be associated with 2 or more IP's I want to get all IPv4 IP addresses and based on the result (if there is only 1 on multiple) to write some logic.

Right now I have this:

$ips = [System.Net.Dns]::GetHostAddresses("myhostname")

but when I execute $ips.Count right after I get 2 and when I do the following:

[System.Net.Dns]::GetHostAddresses("myhostname") | foreach {echo $_.IPAddressToString }

it turns out that I got the IPv4 and (almost) IPv6 addresses.

If I am sure this will always be the case it's OK, but since I want to check for multiple IPv4 addresses and I don't need the IPv6 at all how can I take only the IPv4 ones and check theirs count?

Upvotes: 0

Views: 6760

Answers (1)

Ansgar Wiechers
Ansgar Wiechers

Reputation: 200193

Filter the result of the GetHostAddresses() call by address family. IPv4 addresses have the address family InterNetwork while IPv6 addresses have the address family InterNetworkV6.

$ips = [Net.Dns]::GetHostAddresses('myhostname') |
       Where-Object { $_.AddressFamily -eq 'InterNetwork' } |
       Select-Object -Expand IPAddressToString

@($ips).Count

Upvotes: 6

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