How to get public IP using Powershell

   1: $r = [System.Net.WebRequest]::Create("http://automation.whatismyip.com/n09230945.asp")

   2: $resp = $r.GetResponse()

   3: $reqstream = $resp.GetResponseStream()

   4: $sr = new-object System.IO.StreamReader $reqstream

   5: $result = $sr.ReadToEnd()

   6: write-host $result

That scrips makes a HTTP GET to a page in http://www.whatismyip.com to find out the public IP address of the computer running the script.
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