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Regex to extract DNS Servers from ipconfig /all [duplicate]

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I have looked around for a solution to this but haven't found anything good yet. I need to extract the DNS Servers from the output of the command ipconfig /all in a powershell script. What would be the best way to pull out this info?

Example:

Lease Expires . . . . . . . . . . : Monday, August 6, 2018 12:46:13 PM
Default Gateway . . . . . . . . . : fe80::200:5eff:fe00:204%4
10.161.180.1
DHCP Server . . . . . . . . . . . : 10.221.228.17
DHCPv6 IAID . . . . . . . . . . . : 115363651
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-22-DE-E5-35-E0-4F-43-29-6E-21
DNS Servers . . . . . . . . . . . : 10.50.50.50
10.50.10.50
NetBIOS over Tcpip. . . . . . . . : Enabled


I need to pick the 2 IP's 10.50.50.50 and 10.50.10.50.

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1 Answer
1

You could use a Regex like this:

"DNS Servers[ .]+:s+(?<DNS1>dd?d?.dd?d?.dd?d?.dd?d?)s*(?<DNS2>dd?d?.dd?d?.dd?d?.dd?d?)?"


This article has several examples of using Regular Expressions from PowerShell:
https://kevinmarquette.github.io/2017-07-31-Powershell-regex-regular-expression/

Here's how it would likely solve your question:

$result = ipconfig /all
$groups = [regex]::matches($result, "DNS Servers[ .]+:s+(?<DNS1>dd?d?.dd?d?.dd?d?.dd?d?)s*(?<DNS2>dd?d?.dd?d?.dd?d?.dd?d?)?")[0].Groups


To get the first result (DNS1), use $groups[1].Value and for the second (DNS2) use $groups[2].Value. The result would look like:

$groups[1].Value

$groups[2].Value

$groups[1].Value -> 10.50.50.50
$groups[2].Value -> 10.50.10.50